So it's not a problem to get involved in the world of trading, but don't make it the main place to cover all your needs because the necessities of life will not be tolerated, in the sense that when you need money you have to have money at that moment, while trading is an activity. It's risky, which means that not every session you make a profit, that's why most people always choose a job that is certain with an agreement to get a monthly or weekly salary.
If a trader is able to cover his expenses through trading, I won't be stopping them from doing so. That only means that they know what they're doing and they're effective traders.
There's nothing wrong with what they do as long as it is sustainable whether they treat it full time or part time job.
What matters to us is we shouldn't be meddling with the work of other people that are just trying to put food to their tables.
We are not here to prevent or interfere with anyone's choices or lives because we have no right to do that. People just want to say that if we make trading our main job and depend on it as our main source of income then it is too risky, and advise people not to do this. As you know, making a profit in trading is already difficult and it will be even more difficult when you set a goal of needing to make a profit regularly every month to meet your daily needs. So, giving advice to others, especially newbies to help them avoid making mistakes is not a bad thing, and I also don't think advising others would be considered meddling with their work.
Personally, I would never consider trading as a main job because income from it is not guaranteed, it should only be a side job when we have free time.
As Dewi Aries also mentioned below, even experienced traders give similar advice, if we want to become a trader, we must first have another source of income.