Well, the marriage was reversed, so I don't know why they could not bring it back for another couple of decades and then revese it again, and back and forth forevermore.
Also, anyone who started reading Spidey in the late 80s, 90s, or early/mid 00s, grew up on a married Spider-Man.
That was my idea of the character, that was my Spider-Man... that was where I was waiting to see him go in the early movies.. and look forward to seeing adapted on film. Just as he graduated high school, finished up college... my Spider-Man got married and he could possibly also have a child. I found his marraige to MJ fascinating and an endless story engine. His future was still full of possibilities and great stories from there on. That was the character I was interested in.
Marvel defiled that great character and his great history and my excitement for where his life was headed, for something far inferior, a static single character unable to progress because they suddenly feared the character not being a figure of youth. His narrative was sacrificed for their brand. They dumped my Spidey and stuffed him back into his stereotypical mold never to go anywhere and we now know the character is full of impossibility. Once he could go anywhere, his life could change, he could grow. Now he can't, we know what Marvel are not willing to do. How is this better than what we had before?
How many comics were made with a married Spidey? How was that not proof enough that they could sustain that character and keep books selling just as easily as they do today, without having to abandon so much rich backstory that was beloved by so many fans.