I'm not sure how prevalent it really is, but there is a mini-genre on social media of waiters and waitresses being baffled by this phenomenon. I'd say it's a natural continuation of the erosion of social skills and the comfort of not having to communicate or be awkward or be seen as ignorant. People already shifted to takeaways and ordering to home even from "regular" sitdown restaurants, enabled by Wolt, Uber Eats etc.

Now, regarding the "point", I guess going there in person but not interacting much with the server is mainly about being able to say they went there and that they can post about it on social media and feel like they are keeping up with the Joneses.