You make this sound like Skyrim or Morrowind were cRPGs instead of 3d action LOL (and both were walking simulators)
If Morrowind is an action game to you, maybe stick to turn based games and turn in your drivers license.
Oh I try. I consider these 1st person, 3rd person games much worse than any isometric RPG. When people were playing Morrowind at release I was still playing BG1/BG2 and considered all of you casuals.
I didn't get overly into Morrowind either. That being said, it's less action oriented than almost anything that I can think of that still involves movement. In fact, I think there's a pretty good argument that BG1&2 are more casual and action oriented than Morrowind, even though I like them more too. I just don't think it's the sort of monocled comeback you seem to think it is.
Calling Morrowind "walking simulator" shows complete lack of understanding for what the term actually means (Morrowind has combat and a lose condition, at least technically speaking, you can still play in a "doomed world", but this is considered a loss). So even if someone got bored exploring it, it still doesn't make it a walking simulator (or even a bad game) and says more about himself than the game.
Also, anyone not considering Morrowind an RPG shows he has no business in classifying anything. Morrowind may be considered "3d action LOL", but it still has a plenty of RPG mechanics that are precisely what makes it an RPG (whether you consider it action RPG or not). There may be games that are very nominally RPGs (on the account of having numbers, class, etc. in the character sheet), but Morrowind is not one of these games, despite being an odd duck.