it depends. in some scenario, if the difference isnt THAT large, it can still make sense.
for example, if we are a level 1 trauma hospital. having a few crna provide flexibility. where as having all MD only can create a problem, because if all the MD are in rooms, theres no one to give breaks, you give our own break/lunch. also if a trauma comes in, who is doing it? everyone is in room. who is covering the pacu? we do sick patients, and our PACU have patients waiting for ICU, post strokes/thrombectomies, etc.
so if its MD only, do you have 1 MD just sitting there waiting for traumas? do you have 1 person sitting there just for PACU? with crna we can cover a room, generate some revenue, while still cover PACU, and trauma if it hits by pulling a CRNA from another room. and it makes it safer by having more than 1 pair of hands for big cases. its impossible to manage sick patients, chart, MTP, with 1 anesthesiologist and no help
unfortunately, crnas getting more is just the supply vs demand right now. the crnas dont want to work for less than their rate, while for a lower rate we have MDs applying for the job.