and schools with all purpose fields tend to use a mixed height fake grass, but to do it right, you need different length turf for FB vs lacrosse, and probably variations for baseball, soccer, field hockey, etc..
The better stuff is fairly soft but the cheaper stuff that lasts longer is usually rough and gives you horrible carpet burn. My son ends up wearing fairly thick leg and arm protectors even when it's warm because when he doesn't he ends up with abrasions and those take a while to heal and can get infected.
I know sometime back female soccer goalies were showing up with disproportionate versions of some cancer apparently due to not moving much on the turf and use of ground up tires. Probably obvious, but I'm not a fan.