I agree. I was trying to walk quickly past them one time and a greeter quickly walked near me to ask me if I needed help for anything. It felt like bouncers in a club.
On the other hand, someone who regulars an Apple fan website and forums probably isn’t the customer they’re trying to appeal to. My guess is that the goal of having a line of greeters there is to prevent disgruntled customers from feeling like they can’t find help when they go to the Apple store for a product repair, software issue, buying help, etc. It has made my life easier to immediately walk in and get help when I’m just there for online order pick-up or when I had the rattle issue with my AirPods Pro.