

Because not all use cases call for it.
If you are working in a city with wifi everywhere you don’t need a LTE module.
If you are a mobile worker like a field tech thn it makes more sense to have an LTE module.
At the ISP I worked at we did that. Office monkeys has laptops with no LTE while us field engineers did have LTE modules.
What’s worse is those same organisations get corporate welfare (tax breaks) but fight tooth and nail to prevent their workers from getting it.