Why do people go to real restaurants, with chefs who actually cook things, when they can cook at home? Possibly the quality of the food, atmosphere etc.

Why do people go to pub restaurants, where one of the overworked staff will put a frozen meal in a microwave until it goes "ding", then slop it onto a plate for you? Probably not the same reasons, and you'd expect a lot cheaper, though not as cheap as the same microwave meal from the supermarket.

Do people go to what they think is a real restaurant, because its marketing has diddled them, but find out it's actually a pub restaurant when they get there, replete with low-effort slop? If they do, I hope they leave a terrible review and don't come back.

Interesting division you make there, I go to both "real", higher end restaurants and "low grade" pub restaurants. For me, the the reason is the same, convenience, laziness and lack of my expertise and willingness to cook.

Obviously I can judge a place based on the quality of service and food, but that's not the reason I've gone there in the first place.