Not stupid, but I think the Momentum 4 are better subjectively and objectively. And cheaper.
Not always we buy based on absolute value. Sometimes you just prefer something that doesn't align with what most people want or need. Nothing to do with stupid if you are servicing a particular need.
Back in 2009 I was into headphones because the HD600 or HD650 were so much better than any full size speaker system that I could afford. Even a few years ago, both headphones paired with decent DAC and amp were much better than a speaker system costing 3 or 4x.
A few months ago we were testing systems and the headphones were not in the same league of a 4x speaker system, and I understand the Senns hold their ground against mostly any headphones in their price range.
I thought this experience was relevant to your question even when not directly answers it.