If you are not proud of what you are doing then why are you doing it? People have every right to say whatever they want, you aren't living on what they say, do not care and live your life, I am into gambling and I don't see need to tell anyone but even if they know I don't give a damn what they say after.
If you know what you are doing they won't be able to say that 'they are right' about one day, gamble responsibly so that they won't be able to shame you, I know someone who was a gambler, he never told anyone until he lost some money, that's where everyone living in same compound as him start giving him some attitude.
He later moved out of that house, I did told him why he did that, either you are failing or winning keep it to yourselves, some people are already waiting for such an opportunity so that they can shame you.
I am proud of what I do, especially something that results in an achievement, income, or anything related to something that leads to self-esteem. in betting, I don't get the gist of the word "proud", which has to do with gambling. I mean, gambling is a type of entertainment in the modern era that anyone can play. most importantly, that someone has met the requirements to do gambling. the point is, I don't get the essence of the meaning of the word "proud" which refers to gambling. let's just say I won the bet, I reacted casually. most importantly, we enjoy the sessions in gambling that we do.
Talking about the secrets of gambling habits that we do, I think it's a normal thing for many people who like this hobby to do. There are various factors that make people gamble secretly, in other words maintain secrecy. as the OP said, it could be that someone maintains their reputation and all kinds of things so that they are not looked down upon by the people closest to them, or their environment and I think they have the right to do so.
For me, gambling is a fun part of the hobby. if it's not fun, it means I won't gamble. in this era, gambling is not something that is taboo. there are some people who are just curious to try it, there are many who don't care about gambling. there are those who are victims of addiction, there are also those who play just for entertainment and fun. everyone has the right to do this, but what we need to know, that gambling has risks in it. and if one wants to gamble, one must be prepared to lose. for me, gambling is a matter of privacy, without having to be known by the public. not because of worry about the negative assumptions, but rather that gambling is a personal pleasure.