That maxim clearly doesn't hold how you're applying it because then daikatana would be amazing and DNF would be a masterpiece
Funnily enough, Daikatana has stopped even being a good example any more due to how quickly it was developed.
In fact, let's check out those other lengthy development times that might compare to SC:
DNF — killed its studio and wasn't released until someone else took the IP and made a shovelware title out of it.
Diablo III — was not a quality title on release.
Spore — was not a quality title on release, and pretty much killed the career its main developer.
LA Noire — killed its studio.
Star Craft II — was… actually pretty decent.
ESO — was not a quality title on release.
Apollo Program — initially good, but was killed off due to poor ratings.
So, the maxim seems to be that, if you're a 90s dev superstar, long time = death of your career and studio, unless you're Blizzard and make $bajillions/month that let you prop up pet projects indefinitely, and even then, the development time does not actually correlate with quality. Hmm… could use some massaging to make it more pithy.
Come to think of it, maybe I should update that chart and add Freelancer too…