Right or wrong, different sanctioning bodies have some different rules, as they're often reactive to an event.
That said, it has always amazed me that for decades, Cup cars would get their mech fuel pumps knocked off in a wreck, with an ensuing fire.
Or that it took them forever to mandate fuel cells with rollover valves.

My experience has been that the tech guy(s) at the track sometimes had their own interpretation, or wanted something changed/upgraded to suit their own standard.
Yet from time to time some pile would pull up next to me in the staging lanes and I'd pull out so I wouldn't have to run alongside him.
The NHRA Div 6 tech guy has more stringent requirements - a few beyond the rule book - than anyone who teched my car in Div 7.
The answer for that is to build to the next ET/whatever level - likely feeding NHRA sponsors ? - so you don't have an issue when you get to the track.