Sounds like you and a lot of others read the word ”interview‘ and think of some formal process. And yes, some definitions say that, but others define it more as a one-on-one inquiry to determine suitability which can be done in a number of ways. The fact that sometimes you can’t doesn’t make the whole concept ridiculous.
I enrolled in a college, not a professor. And no I didn’t sit down with professors to determine whether I would take their course (well, once). But I did use course reviews and student feedback to choose most professors and courses after my first year.
I don’t have a one-on-one relationship with any cook when I go to a restaurant. Not the type of relationship where I care about their personality mesh with.
Yes, I‘ve spoken with a number of my mechanics before hiring them. And when I haven’t, similar to what I said earlier, I knew whether I would work with them after one experience.
And, before you ask, no, I won’t interview the lifeguard who swims out to save me.
If you get to interview me as a CFI, it’s because you asked. You might have to buy me coffee however.