I have a friend who is self-employed. He uses an iPhone and a MacBook Air. He only uses iMessage, Numbers, Safari and Apple Music for entertainment. He gets away with 8gb just fine and rarely has to reboot.
He probably could use a Chromebook or something even lighter, but the support and ecosystem were enough for him to pay the premium. His time is valuable to him so it was worth it to him.
I dunno man. I got nothing. I don’t understand it either.