They’re the ones using their devices all day for work or similar.
I spend about 10 hours a day doing “real work” - writing software - on a desktop Mac with an M1 chip. It’s way faster than I need. Having even more power than that in an iPad? Overkill is an understatement.
I get why they’re using an M4 — supply chain / economy of scale works better if you have most of your hardware on the latest chipset and also the M1 is missing some important features. Also the M2 was basically an M1 and the M3 used a particularly expensive manufacturing process that was only really sensible for high margin products like the MacBook Pro… so that leaves M4 as the best choice. But for me the marketing is missing the mark by focusing so much on CPU performance. Just say “it’s really fast” and move on to other things, leave the exact details for the spec sheet.