The 150lb thing was pretty clearly because he thought his weight would be a disadvantage. Like saying he wouldn't play basketball because he was 5'4" and had a bad knee, the weight and the danger weren't related to each other, they were different factors in the final decision not to play.

If that is the case, that just shows that the author is on very tall stack of misconceptions. No one plays full contact football recreationally. It’s completely too dangerous. People mostly play flag football. Also most sports have leagues grouped by size or ability. The author dismissed the sport out of hand with wrong information.

I think you are missing their point