Yep, very well might be. BUT. Almost every young kid wants to be muscular and hit the gym - you can't say the same about tennis court...
Not sure what world you grew up in but in elementry school, jr high and HS 90% of the kids were pussies, druggies or just lazy as fuuuuu and didn't want to go anywhere near the gym and didn't give a shit about bigger muscles.
Kids just wanted to smoke weed/drink, play video games or chase girls. Gym & weight lifting was the last thing on most kids minds.