So if someone wants to play table-tennis I should constantly remind them of the how they should get a $100 custom bat before they can do anything, use the correct technique by using their body and legs and sweating a lot instead of just letting them have fun? I am always happy when someone joins the club, even if they are good or not, it's their decision how much time, money and effort they want to invest in correcting their technique and improving their skill.

There's a difference between being honest and clear and being a jerk.

Most humans are not so bad at figuring that out.

I agree, although my point was that some people just want to have fun doing something, their goal isn't necessarily to get really good at it or to do it correctly. Many prefer doing things their own way rather than the right way, so they might not like being constantly told what they should do.

Also, perhaps it's mastery vs. creativity.

People who are learning an instrument are arguably at their most creative in fact because they don't know the right way to use the instrument. As they become more proficient it seems they "fall in line" and naïveté and serendipity go by the wayside.

This is so true, as soon as I started learning more music theory I felt that my creativity went down as I started recognizing chords/progressions and I feel slowly getting stuck trying to play by the rules.

> so they might not like

No shit. I said, 'most people are not so bad at figuring this out'.

You're conflating an approach to niche skill development with jerks who don't know how to behave in public. They're not the same thing, and again, most normal people seem more than capable of figuring this out.