people rather sit in their car for 15 minutes than walk for 1 to save 10

Or because their kid or dog is in the car. Or because they have difficulty walking. Or because they just want to decompress and scroll their phone or listen to the news for 10 minutes. Or they hate crowds. Or they are immune compromised and don't want to be mingling with a bunch of people around a counter. Or they have social anxiety. Or they have a cold and just don't feel like getting out of their car. Or they are expecting a call from the baby sitter. Or they are having a fight with their spouse which they don't want to export into the public.

IMO, drive throughs are great, I hate crowds and queues (yes, the car line is a queue, you know what I mean), and it is much kinder to my bad discs in my back (transitions from sitting/standing is just murder, steady state is much better). It would take a egregious queue to get me to go in in most cases. But sure, I'm lazy or just reaaally bad at math. edit: I also find it hard to hear in high volume rooms with lots of reflections (like an in-n-out), and yes, the drive through can have it's own sonic issues, but it is generally smoother for me.

Sorry, but I get tired when people take the most uncharitable read, especially when they blanket apply it to everyone.

people are allowed to make broad generalizations without listing caveats for every exception, this kind of pedantry is exhausting

people on the whole are lazy and bad at math, yes some people are not... that's not who we're talking about

I think your parent made a perfectly good point. Going into the store is a whole lot less pleasant than staying in my car and waiting a couple extra minutes in an environment I enjoy.

If I’m in a hurry then yes maybe I can shave a few minutes by going in, but if I’m getting fast food I probably don’t feel like interacting with people, and listening to crappy piped music while standing in an artificially lit corporate chain restaurant waiting for my order.

Don't disagree with your generalization of the interiors of fast food restaurants, but I can't say I prefer the interior of my car either.