Couldn't agree more. Even if I had the scratch to tried out a MRDS on a pistol, I'd have to use the marginally OK MOS system in the hopes of not having to ruin a slide trying the "wrong" optic.
Sooner or later, one would hope, manufacturers will figure out that if there's not a standard footprint, they're going to have a hard time getting the general public to dip their toe in these expensive waters...