Who knows, maybe Bolt has terrible hands and could never catch a football. I guess he could still be a great safety.
I would take a great athlete over a very strong person any day of the week and twice on Sunday. However, great athletes gaining strength is a very positive thing.
Don't make too much out of the numbers. There is a natural cycle every year to weight lifting results. Every player on the team is weaker after game 12 than they were on August 1. Also, losing the older (and hopefully strongest) kids on the roster at the end of the year lowers numbers. The most meaningful stat to ask is: how many players could rep 20 at the same time last year? I have no idea what the answer would be. We may actually be getting stronger as a team, and if we are, there is no negative to such a thing. Strength only improves your abilities. Heck, even PGA tour golfers are figuring that stuff out now. No receiver will lose speed because they can lift more. That is a fallacy. As long as they are stretching and running during their training, they will be fine.