I agree with you, we could say that day trading is more like gambling if you're unsure on what you're doing or you have no idea how it works and Some traders should know how to control their emotions. well, everything is easy to learn if you are really interested, we have a lots of accessible tools that will help to do some research regarding this matter.
Even in that case there are fundamental differences between the two, in the case of gambling even if you knew nothing about the different games offered by the casinos your chances of winning are still as good as the chances of everyone else, so your ignorance does not have an effect on your potential outcomes.
But when it comes to trading we see the opposite, as if you are ignorant about how the market moves and what you can do in order to take advantage of those movements you will lose your money without any possibility of getting it back.