And why exactly would these customers get a MacBook "Pro"?

I can see how a MacBook Air with low base specs (8/256) has its audience. I recommended a base spec M1 Air to my aunt 1-2 years ago and she absolutely loves it. She got it for about 950,-€ I think, and with her coming from Windows laptops costing half as much at most, there was no way she would've spent more than 1.000,-€. She does some surfing, mailing, word processing, video conferencing and photo library management (using iCloud Photos). It's completely fine - might even say pretty great - for that.

Nowadays you can find some deals where the base M2 Air is < 1.000,-€, and that's also a decent deal.

The base model M3 MacBook Pro is 1.999,-€. Now Apple magically added 200,-€ after accounting for taxes and exchange rate ($1,599 is about 1.500,-€, add taxes to that and you're at 1.785,-€, so 1.799,-€ should've been the price, but they made it 1.999,-€ anyway), but even if third party sellers sell it for like 1.800,-€ in a few months, it's still 800,-€ more than the base model Air. I know you get more ports, a way nicer screen etc., that's not my point. My point is that people who are looking for a "good enough for simple tasks" laptop usually don't shop in that price range, and people who do usually have higher requirements than 8 GB of RAM.