When I hear arguments like this I feel compelled to point out that the people running these businesses live in the same world as you.
I don't know how old you are or if you remember, but the examples you gave used to be the most common sources of complaints, delays, refunds, etc. when the employee would do a shitty job (fairly often). The world of the past really was objectively worse.
Ahh yes, having someone to wait tables at a restaurant, someone to scan and bag groceries, someone to take your medical history, having furniture already assembled etc. was really objectively worse.