Wait, like me how?
Your entire argument is "I don't use these things and I haven't made an effort to understand how or why people might use these things or find value in them, so they should go".

Which is crappy.

Not everyone plays in the same way as you, or has the same experiences or desires as you do. Don't bother using your chocobo companion? That's your choice and I respect that. Don't want to get a party together to do old content? That's fine, not everyone does. Don't see the purpose in Guildhests since you've already learned the lessons elsewhere theoretically? That's okay, they're not targetted at people in your position. Etc etc...

I fail to see how your lack of interest in certain features justifies cutting them because basically everything in the game could be argued 'cuttable' if we're using "someone out there doesn't do it" as a judgment.