It's about money, Burton etc. is irrelevant. Notts' attendances are at least more than twice the amount of 16 other clubs at this level, there is no comparison with the Championship (it has its problems but a lack of support isn't one of them). Post Covid, there's now talk of there being too many professional clubs, that we need to downsize etc. The NL is under threat, losing Notts will weaken their voice. Look what happened that weekend when we carried on after all other leagues had stopped playing, all of the media focus was on Notts.
The NL would very much like us to get used to being in their tinpot league, to not question their decision making and to shut up and be good little boys.