They could just accept games as-is and be honest with themselves about how any genuine enjoyment they derive comes from their compromise of working around the broken or poorly executed aspects of these games. Instead they tend to dismiss comments from people prefering non-gilded games, particularly rival titles (like Ninja Gaidens for non-Nintendo platforms).
I know what you are saying and think it is a valid point, but maybe a bad example. If someone told me they preferred the PCE version (which I think is the only one that is actually the "same" game, could be wrong there) , I'd have to ask them why, honestly. I'd think the NES version was leagues better even without my Nintendo tramp stamp.
Not to split hairs, but the Atari Lynx port of Ninja Gaiden 3 is the "same" as the NES version. To its detriment, as the graphics were just scaled down instead of being redrawn completely for the lower-res screen. Other than the attack and jump buttons being irreversibly swapped in the Lynx port, the controls are perfect and the gameplay, enemy placement, and level designs are identical to the NES original. The worst of it is the soundtrack. It was great on the NES, but it was butchered on the Lynx and does a huge disservice to the port. I am a huge Lynx fanboy, and I love the NES Ninja Gaiden trilogy, but I can't bring myself to like the Lynx port of Ninja Gaiden 3. I can't see how anyone who wasn't already a fan of the NES version could get much enjoyment out of the Lynx one.
On the topic of NES NG vs. PCE NG, I adored the NES version as a kid, and my glasses are more rose-colored for it than probably any other single game. But I was overjoyed to learn about the PCE version 20 years or so ago - I always enjoy exploring different "takes" on my favorite things. I've only played about halfway through the PCE version, but the choppy scrolling is really distracting to me. It's a shame, as the graphics overall are much nicer than the NES and SNES versions.
(Sorry, I probably shouldn't have even mentioned the SNES version...I just took the whole conversation down a few notches.)
I don't care for what I've heard of the soundtrack in the PCE version, but I can't say that's due to anything more than nostalgia. There's actually a recent thread at the Castlevania Dungeon forums in which the topic creator tries to show that the PCE version's level 1 theme is superior to the NES version's.