You said that in the wrong order because some gambling consider gambling a plain entertainment source, and most gamblers take it as an unreasonable demeanour like a source of income or something which it can't be because whether you win or lose in gambling is dependent on your luck and there is nothing else that can influence the results, so considering something like this being a constant income source is nothing but being foolish.

Those who take gambling as a source of entertainment will barely spend much money or time on it because they know there is no point in doing that, but those who are always looking to earn an income from gambling will spend most of their time and money on gambling only to get nothing at the end.