More popular, more commercially successful, and more accessible to casual fans. Agreed.

But for magnum opus, I gotta agree with the wall for a few reasons

1. They made a movie out of it
2. The ode to the intense para social relationships that revolve around stardom and how a truly crazy creative can take advantage of it in scary ways was not only true back then, but predictive of how much worse it would get in current time.
3. DSotM always seemed like a lot of good ideas in an unordered list. I felt like they could be scrambled and the album would be similar, except for the first and last songs… Meanwhile the wall tells a story of pain, alienation, search for meaning, lashing out, and then a quest for self-forgiveness.