I don't tell them what caliber to get. I inform them what the different calibers will do and let them make an informed decision.
If I'm showing someone how to shoot for the first time, I let them practice dry firing with my handguns. I let them try different actions and try different triggers. I show them the proper technique for holding a handgun, trigger control, sight alignment etc. I let them tell me what feels best in their hands.
When we've narrowed it down to a few handguns, I bring them to the range and have them shoot the guns. Their comfort level tells me how to narrow down what firearm seems to suit them best.
I also don't post every month or two about how much I love the .32 and other small caliber handguns. Seriously? Why do you do this?
For the record, my first handgun was a 9mm Makarov copy (FEG PA-63). I then went to .40. I got a .38 special snubby, and so on and so on. Only now after many years of shooting am I contemplating about a .22.
I see no reason in telling a new person what caliber they should get. I do see lots of benefits in teaching proper gun handling technique, what the safety rules of gun handling are, how to pick a handgun that feels good in their hand (not mine), how to pick a handgun that will work well with the style of carry THEY wish to do, and how to pick a caliber based upon what they want that caliber to do.