This idea does make sense and the OP has given one of the headings that cause someone to enter and get involved in gambling. Everyone has experienced loneliness and whether they choose gambling or something else to occupy their time is a choice and it is also quite possible that circumstance could be the driving force behind why they choose gambling. I have one scenario where they are lonely and then open their gatget and accidentally find one of the promotions from an online gambling site and that's where it all starts, I don't think I need to continue this scenario because you can probably guess what will happen next.
So basically I think they can get into gambling in any way whether intentionally or not and one of them is this loneliness, the danger is when you try it and then you keep an interest in the activity. Yes usually this kind of scenario will be very likely to happen to those who are introverts and to minimize it they should try to be more open to the outside world such as playing with friends or relatives, it will be useful to distract you from gambling.
I have a friend whose wife who lasted with him for 23 years, with grown children of 18+, left them and went to the USA, he says that now he feels lonely, but sometimes I cheer him up and all that, but instead of launching into one of the most logical things for someone like going to drink a lot of alcohol or something, no, what he did was decide to get ahead, he gave up alcohol, 'he can easily go to Colombia to a casino play or from the phone to play, because I talk to him a lot about the casinos here that if stake.com, bitcasino.io, and I say the games, the slots and it catches his attention, he doesn't do something like that, he does it What was said was that he made the effort to stop drinking alcohol, and get ahead, so he is a person who did not think about drinking, or going to a casino, he is only with his son, his other daughter, well, she is also living With him, of course he feels alone because he himself tells me that he gets up at 3 am to cry, and when it dawns too.
So loneliness in people is not the Kind that many take it for , I think that life is very beautiful, a person who has how to travel alone, enjoy places alone , I think that is priceless, if you feel bad or alone, Well, it's easy to get out, search, maybe find a new love, but you don't have to indulge in things like gambling or alcohol, drugs, none of that is necessary, those things make you feel more alone, things are like that when you need them, do much more, for example a person who feels alone can go out, go to a park, of course, but yes, going out to play in a casino has to have a balance willing to lose, nothing more, have that for Don't fall into problems, because falling into addiction and then facing another problem, I believe that those things are not and should not be like that, if you are trying to overcome something you have to do it in the best way , not putting on yourself more things that bother you even more problems.
It seems that your friend has a very good and mature mindset in life and his stance, he knows that the situation and circumstances of his life are not fine because maybe there is something that tells or makes him have to separate from his family, loneliness will obviously feel when away from his family and this is a good situation for us to associate with gambling or other diversionary actions to minimize the loneliness he feels like drinking alcohol or whatever, But if indeed your friend does not touch these two things at all then it seems that he is one very mature and firm person, knowing that all these actions will only make his situation worse, this is the real understanding that everyone should have including gamblers who may already be involved.
"Loneliness makes a person addicted to gambling" I think this statement is nothing more than a possibility or an indication that can make a person get involved in gambling just because of the urge of loneliness, not always directly into addiction but certainly involved in gambling, because for the matter of addiction will require enough time to experience many things that are tempting enough to end up being tempted and addicted. It's all a choice and everyone has different interests and interests in something, some of them may not like going out alone or other things, and that's why they choose gambling, it's all their right and it's up to them.