I can't fathom why anyone thinks that concrete wall surrounding a pitch is safe, in 2025.
This is the 2nd such critical incident that I have heard about, the other being Alex Fletcher at Bath, occurring as a direct consequence in the last.
I've also witnessed it at Bamber bridge a player colliding with the wall there and an Ambulance taking them away. Thankfully that player was okay.
The FA ought to fund the removal of all concrete walls and replace them with composite fencing.
I shudder when I turn up to a game at a ground that has it as you know it's always a possibility that you will end up with witnessing someone suffer a catastrophic injury.