That's so deceitful. Loblaw is also one of those cashiers must stand up or die places. When I worked there they banned water bottles at the tills because they looked unprofessional or so they claimed. At the time I attempted malicious compliance by bringing like 6 of the excepted store brand bottles but in hindsight I was just filling myself with micro plastics.
I've never actually verified it myself, but I recall some of the cashiers I worked with before talking about a competitor that had adjustable height tills with what was described as a horizontal fat metal tube bolted on one side of the worker compartment as a seat. I'm not sure how many things in that area that are still the same as back then, apart from the loblaws superstore which I know is still there.