Here's the thing, jjj.
I don't care what you think. If you want to go check the truth value of some side remark I made, a couple of moments with google will provide loads of evidence that I am right. Page after page after page of "We asked so and so artists why they do it and they said..." with not one of the artists saying "to create a legacy" or anything equivalent.
Since you are too lazy to even bother with that, you obviously don't care whether what I say is true or not.
Really? So where's the link to this 'proof' of what you think is the case. I don't know what you googled to prove a negative. Which is in fact rather difficult to do.
Here's a thing, people create art for a whole host of reasons, some of which won't be to create a legacy, some will. Also there may be multiple reasons why people create art. But I very much doubt any of them will be producing art and not hoping others appreciate their work, even after they've gone. The thing about creating stuff that others like, is that it is a way of being remembered/gaining a sort of immortality. This way you do not simply disappear once friends and grandkids die.