Well, it was (kind of) a joke about "sane and reasonable" because everyone seems to have their favorite reasons for preferring one way or another.

I agree about it being aesthetically pleasing. For me it's the easiest spacing to read and scan code horizontally and diagonally.

And apparently:

> using spaces instead of tabs is associated with as high a salary difference as an extra 2.4 years of experience.

https://stackoverflow.blog/2017/06/15/developers-use-spaces-...