Bans are a thing now a-days. Books all over the place, movies and anything else the wacky decides. This will pass.
This ban has been in place since VHS tapes began to fade out in favor of DVDs, so, late 1980s or early '90s. IIRC, Disney released SOTS on DVD, but only foreign markets... Japan, the U.K. - never released it in the U.S. in the post-videotape formats, AFAIK. Most of the bootleg copies around today are copies of those foreign market DVDs. This particular ban pre-dates the "woke" by many years; I view it as more a part of the same censorship move that saw a number of old Warner Brothers cartoons dropped from catalogs. The early days of "political correctness" were a precursor to this woke crap.
BTW, in the original Pixar "Cars" movie, the animators snuck in a SOTS reference. The opening race scene took place at "Speedway of the South, with lettering on the track wall that mimics the intro title design used in the older film.