I decided to test your assertion. I have a word processor doc open, a spreadsheet, (both in LibreOffice 7.5.9) music playing, This web page in Safari, Activity Tracker, and Mactracker is still open from last time I used it. My Mac is a base M1 MacBook Air, so 8 GB RAM. Memory used is 5.8 GB. Swap used is zero.Dude 8GB is pushing it just doing basic standard work environment multitasking (text editor/spreadsheets, browser and playing music for example).
I'm not seeing a problem here. I'm sure I would have an issue editing a 4k video, but I never do that. I don't even have a way to watch a 4k video.
My Linux box does have 16 GB for the "heavy" work (which is still not 4k videos). But for this laptop what matters is battery life, and RAM requires transistors which use power, so the fewer the better as long as I can get the work done.
So 8 GB in the Air is just fine. If you want to complain about 8 GB in a machine labeled Pro then you are on better ground. I'll even agree that no machine labeled Pro should have 8 GB as the base configuration.