> A website doesn't need to know the list of fonts on my machine

Unless you disallow websites from choosing their fonts, that information is really hard to hide. Most likely impossible.

What you can do is standardize the list.

> most websites do not need to know my time zone

Almost anything with a form needs this.

Every information on that page is necessary for something common and desirable. It's not using any advanced fingerprinting that can be blocked.