Many young men who play football come from families where multi generations of family members have played. In my family, my dad and his brothers played football, my brother and I played, my nephew played and both of my sons played, my youngest being the first in the family to play college football and he was team captain for his final season. My older son was the first to score a touchdown as we’ve all been linemen, battling it out in the trenches, blocking to give team mates the chance to score for our team and tackling to stop the other team from scoring. My sons and daughter haven’t had children yet, but I’m hoping when they do, they encourage their kids to play football! I’ll be in the stands for every game, just as my dad was for my nephew and my sons games, rooting them on and enjoying the greatest of sports, football!
Your situation seems to be driven more by genetics than anything else. Of course a family of big burly guys is going to gravitate to football.