This is basically an assumption and it doesn't make any sense when you tried to compare gambling and trading as same. Gambling does not requires a skill for you to get it right ...
I have being trading and also gambling, all in a responsible manner as I can and I do agree that trading requires much skills and strategy to earn a profiting trade. Though I do disagree with you that gambling entirely doesn't require skills to make yourself profit, not all requires skills for with your luck you're good to go but in sport betting you have to knowledgeable about the sports you're of interest in and with your knowledge you don't get to gamble blindly.
In both cases, you have to conduct yourself responsibly. There is a possibility of financial loss in both cases, and in comparison, the situation can become more dangerous in gambling, because gambling is a tempting field. I think that responsibility and limitations need to be observed very well in gambling, because here each bet and its results happen very quickly, so the possibility of losing control is more here. But on the other hand, trading depends entirely on analysis, planning and experience, everything has to be managed skillfully, so trading is not a tempting field, so the possibility of getting emotional is also less, but it is certainly right that it is important to be careful in both cases.