Last time I checked, that didn't mean it was the end-all-be-all physical wall, whose title belongs to Cofagrigus.
Cofagrigus is good for two things in this metagame and those are checking Fighting-types and using Trick Room. It is not a good defensive spinblocker because it's slower than Hitmontop and Blastoise and cannot steal momentum from them (after they get rid of hazards, they're just going to go to Roserade and set up on you), it is not a good physical wall because it's neutral to every important physical attack in the tier besides Close Combat and Megahorn, it's grounded and weakened by hazards, and has really bad recovery.
There's good reason it wasn't hitting anywhere close to UU usage before Trick Room NP or Moxie Heracross. I'm not even sure how long Trick Room + NP will last, but overall physical walling is not its niche. Gligar, by virtue of recovery alone, is absolutely the better physical wall. However, the critique of it having no offensive presence and being shut down rather easily are correct.