No more ambush, new rule forces teams to let the other team know they are doing an onside kick

NGL, I hear all the time that there are tons of injuries on kickoffs, making changes like this necessary, but I honestly can’t even think of any offhand, and let’s just say I’ve watched a ton of football in my life. 😂

Why am I not seeing them?
No doubt. And certainly not onside kicks. It's not like players can get to full speed in 10 yards or so. This was more a solution in search of a problem that doesn't exist.