On a similar vein: Why do I not get a small discount, say 1%, if I go and use a self-checkout instead of going to a manned checkout? The cashier isn't serving me, so why am I paying for his wages?
I am, of course, fine with receiving less service if I am expected to pay less accordingly.
This is the usual race to the bottom on the market.
Restaurants are one of the few areas of the market where local businesses that are deeply connected to their communities still thrive.
There are plenty of restaurants & pubs near me who recognise me as a regular customer by name. The people at those places genuinely enjoy making their customers happy. It's much easier to care when your customers are living, breathing human beings with names you know whom you see frequently. The same can't be said for McDonald's, but there are places that aren't so soulless.