Setting a gambling limit and bankroll limit are precautionary measures not to over gamble and stake to avoid regrets afterwards in the game you have bet on. As a newbie gambler you must learn the bankroll management rope so that you don't fall out early in the gambling journey because when you start losing so much in the beginning, that will discourage you from continuing. Therefore, a gambler who doesn't take charge of risk appetite but only eager to only look at profit to be made, it won't be a good gambling experience.
Newbies other than being conversant with bankroll management would need a coach present to guide them on the actions and decisions to follow while gambling. Because a newbie who gambles all by himself can get lost after winning some funds, that he'll forget about the bankroll management tricks or strategies. I'd suggest the coach should be in control of the funds for the newbie, such that he won't think of going more than he has planned to go that day. When a gambler begins to experience wins at the early stage, he's more likely going to spend extra time gambling, as he trusts his guts of winning some funds gambling. So, being naive isn't a great option for new gamblers, they need some guidance around to take them across this tough game of mind.