Online dating and food delivery are popular because they're an allegedly more efficient and safer (in the case of dating) way of getting what you're looking for delivered to your door. Online dating is basically pre-screening, and a substitute for various real-world stuff that's increasingly less accepted (the workplace) or normalised (bars.. still a thing, but much less so than they were).

If I could chat in person with the people I talk to online, I would. And sometimes, that happens. But they're typically far away (for various values of far), while also being more interesting (ditto) than many of those more nearby.