I'll try and restate what Xah is saying in less Xah-ish language.

Emacs comes from a time when anyone who used a computer knew (about)
programming.
Today everyone uses a computer; so the programmers are the freaks.

The scratch buffer is meaningful/useful/beautiful for those who can
understand what it signifies that they can (re)program their editor.

It is a stupid and meaningless irritation to those not so endowed.