I think a lot has to due with the synthetic turfs we use. If you’ve ever walked on the stuff with the pellets it’s a weird feeling. The turf is somewhat sticky and the pellets under your feet are squishy and not very stable.
I don’t think we had these many injuries when we played on the old style Astro turf with concrete under it.
If the NFL is for “Player Safety” like they claim, every team (Domes included) should be mandated to use only natural turf.