As far as I know AIB’s aren’t required to offer MSRP models and make sure they stay in stock, but Nvidia was offering both carrots and sticks to AIB’s back when the 20-series was current because the optics of no one following MSRP is bad, and I expect both them and AMD still do.
Making only the most premium models only works for AIBs if stock from both GPU companies remains poor. XFX can’t expect to sell $850 models and nothing else if Sapphire and Powercolor are selling cheaper 9070XTs and/or Nvidia actually gets some 5070Ti inventory.
“Excluding region-specific tariffs” is probably the dangerous phrase for the US market, because that’s set to hit tech almost across the board, and what isn’t hit won’t have enough supply to keep up with demand.