On what musk says: he is an edgelord but not completely wrong, if you are someone that values incredible unpredictability and sheer complexity, it is not difficult to see chess as comparably limited compared to something like say, starcraft. Curiously though, people become "Grandmasters" at these other games almost always faster than chess grandmasters at our game.
On what Buddha says: not wrong, but that applies to virtually all earthly activities one uses to pass time and avoid boredom. Chess and chess like games seem of interest specifically because they seem like high minded pursuits brahmin may partake in without losing face . He is scolding them for using another distraction despite its good publicity.
On what einstein said: Einstein was good buddies with Lasker, but im sure seeing such an intellectual demanding activity produce no fruits beyond art for the human species disappointed him. Its no different than me seeing people waste months on doing speedruns in tetris or other games to perfect such an obscure skillset and lamenting what could have been accomplished if all these people did mathematics research or something in Stem.
You mean when the guy says chess is too easy ... Even if he's right once a day probably shouldn't listen lol tbh I have no idea about credibility of Einstein and Buddha on the topic . But the point of there are better things to study your entire life than chess is fair but casually it's not really that much of a waste of time as long as you control how much you do .
Elon musk now not worth listening to so only 2/3 even consider