Totally agree, re: walking if you are able. I feel that’s the way golf is meant to be played, and I know I definitely play better when I walk (I use a push cart).
Probably separate topic / thread, re: course design, but IMHO the better designed courses are those where the next tee box is “proximate” (Alistair McKenzie’s term) to the last green. Sure - some courses are forced to adapt to the land they have available, but I’ve been on a few … carts required … courses where some of the drives between holes was just crazy!