I must admit, I agree with OP. I have a 16" M1Pro MBP but virtually never take it anywhere because it is (in today's world) more of a luggable than a portable laptop. So a year ago when I happened to be in a store that had the 16" MBP and the 14" MBP right next to the newly released 13" M2 MBA, I lifted each in succession. There was a noticeable improvement in weight going from the 16" to the 14" MBP but the 14" MBP remained noticeably heavier and bulkier than the 13" M2 MBA. At that point, I started to lust after the 13" M2 MBA--as an addition to my collection of Macs, a replacement for the 12.9 iPad Pro with Magic Keyboard case, not as a replacement for my 16" MBP.
Fast forward to a month ago when the 15" M2 MBA was announced. I looked at the weight, I saw that it was essentially the same as the 14" M1 MBP that I had already decided was not enough of an improvement in weight and bulk over my 16" MBP. And, following the price drop on the 13" M2 MBA, I found the Siren Song too hard to resist and bit the bullet on a 13" M2 MBA 16/1TB. Now that I've had it for a couple of weeks, I've concluded that for someone like me who was looking for power with extreme portability, the 13" model is the way to go.
The calculus probably would have been different if the MBA were intended as my primary laptop. But, in that case, I probably would have chosen the 14" M2 Pro MBP as being just about the same weight as the 15" MBA and very close in price, as well, yet sporting a much nicer screen and significantly more ports, not to mention the cooling advantage of having a fan.
Basic bottom line, this ends up being a very personal choice. While it might be disorienting to someone new to Apple to try to choose among the various, often similar products, it's great that we have the choice and can pick the machine that best suits our needs to this level of granularity.