while that might be true at a certain level you can be satisfied with your results using a developer and having it do everything.
i used to drive a 73 beetle ... it drove like a charm. it could be repaired easily, the engine removed easily, trailer hitch added easily
so it could easily tow a trailer, and the back seat could be removed so the top part could be folded down to reveal a enormous area to haul stuff
inside the car. it was a simple car that didn't cost very much money, very much like dektol is a simple developer that doesn't cost very much money.
it is well known to make lovely photographic prints, and is also known to make nice negatives.
sure, i know the beetle was a deathtrap, it didn't have a lot of horsepower, it handled like a beetle, it didn't have high back seats so you could get
whiplash if you were driving people around and got into a fender bender, when towing a trailer you had to drive even slower because of the extra weight
or when a truck went by you were pushed by the wind and a bunch of other things that a lot of people didn't like ... but it worked fine.
just like using a developer ( i will say ansco 130 because of my long running affair with it ) ... it made beautiful long scale prints, and lasted for a long time ..
and it also made beautiful negatives ( any format ) large and small ... and worked as a great additive in coffee based developers ...
it took a little of effort to learn how to process film in it, but most things in life take a little effort ...
i never really noticed any trade off whatsoever or any sort of compromises when using a130 as both a print and film developer, actually just the opposite
seeing i never had to buy anything else, i always had 1 developer on hand and it never let me down.
it is easy to always be looking for compromises and reasons NOT to do things ( excessive grain, contrast &c ) they told me the same story
when i was using ansco 130, and i never found any of it to be true ...i am confident dektol won't let me down either ...