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.
One thing I know, if you want to gain profits, you have to earn a skill, even if it’s gambling. Not all gambling activities can be win through luck, knowledge and skills are still crucial. So be it gambling, trading or plain investing alone, having certain skills are still a must.
However, luck should also be present, most especially in gambling. Even in different life’s aspects, if you want to gain all the positivity, luck is still a valuable factor.