It might just not be worth their time and the way businesses are set up Pokemon doesn’t really offer much like MtG or Yu-Gi-Oh! can.
5 releases a year, no barrier to entry so you have competitors everywhere. It’s very difficult to buy the Pokemon cards which are actually worth anything from people. The long term plan for Pokemon is to have insane amounts of capital and buy every vintage card or sealed product you can find and hold them for years, a business like an LGS isn’t able to do that.
LGSs aren’t really about walk-in traffic. They’re a destination.