For critical data like that, it would make more sense to just have a modem on board. 5G should make this more possible with increased device limits.
5G is only useful if you need bandwith in an area with very high contention, like a stadium, or you're in an area remote enough that the lower frequencies work but the higher ones don't.
4G might have a larger coverage per cell, but if it isn't able to handle all the devices trying to connect then that means nothing at all.
5G can have comparable coverage, by the way.