I agree with some of what has been said. ENT fittings are expensive.
PVC fittings are not expensive, and may or may not be listed for use with ENT, but sure do work great if not going to be rejected. If they are not listed for such use why do they make them fit so well??
I do agree that "residential" only electricians seem to have some kind of issue with any raceway wiring method - even a short nipple between a panelboard and receptacle seems to be taboo. Some of us that don't limit ourselves to any one particular installation type may not be as efficient at some types but seem to manage to take advantage the ability to work with multiple wiring method types, and will work with what the situation calls for. I have started to use less 8-2, 8-3, 6-2, 6-3 NM cable. got tired of having multiple pieces only 10 or 15 feet long left over that you can never seem to get rid of. Don't use enough of the stuff to make worth buying larger reels either. I do use enough 8 and 6 AWG THHN/THWN that why not run raceway in some of those jobs that I used to use NM cable for?
Can I do a bedroom on the far corner of a house cheaper in ENT then I can with NM cable? Likely not. Can I do a kitchen SABC's with multiple circuits in ENT for less then I can in NM cable - the chances are better then they are with the bedroom. If anything the cost is closer to the same with either method.
Did a finish of a basement more recently, ceilings were to be suspended ceilings, all I did was run NM cable around rooms and stub to some "distribution points" in the ceiling. This went fast and allowed for drywall installation to be done. Came back later and ran EMT for home runs, just needed to make sure to do it before ceiling was done or it will not go quite as easily. I'm confident in my ability to run EMT across the bottom of floor joists much faster then I can drill floor joists and pull NM cables through them. Maybe if I had multiple reels of NM cable and pulled some of the longer runs all at same time this could make some difference, but then I have higher overhead of materials to keep on hand as well. This house had a kitchen added in the basement in the far corner from where electric panel was located. One 3/4 EMT easily took care of the range, SABC's, and a couple other circuits ran to that farther end of the house, and IMO went faster and used less copper then NM cable would have taken.
If you are not convinced this was the better way to go that is fine, we are all different and have different abilities, this is what worked for me.