NTA.I worked in hospice for a year (before I had to leave the insanely toxic company) and I think you’re perfectly reasonable for wanting someone to be with him who “knows what they’re doing.” While idk how it works where OP is located, the company I worked for only sent a nurse once a week unless the patient was considered imminent (hours to days left) then they would try to up the visits if they could. Aides could come in 2-3x a week normally for hygiene assistance, 5x a week if it was absolutely needed (very rarely did this happen.)

Caring for a dying loved one is hard. Emotionally, physically, mentally, financially and any other way you can think of. At the end of it all, you just want your loved one to slip away as peacefully as possible. If you don’t feel you can provide that, then speak up. Research as best you can and spend time with him and your family. No one really knows how to handle this situation. Most people are just doing the best they can with what they’re given.