Description of the need
I suspect that most people who enable the core Contact form do so in order to allow visitors to contact them, without needing to provide their email address publicly. As such, I also believe that most emails recieved through the contact form have nothing to do with feedback about the website itself (that seems like a very specific use-case).
Proposed solution
I therefore propose renaming the default Contact form category from "Website feedback" to something like "Website enquiry", or just "Enquiry". To me this seems more generic and a better default option.
Alternatives that have been considered
Users can always just edit the default category themselves (I personally have to do that all the time).
Additional information

Recent comments
Check out this post re: tempstore: https://forum.backdropcms.org/forum/tempstore-table
Which database tables can I saftely empty before DB backup
Hi. I use the "[node:title] | [site:name]" tokens for the main image of news articles, blog posts, and similar publications. It's a quick and practical automatic ALT.
How to Improve SEO Performance in Backdrop CMS
I understand how tokens work, but not so much their practical use in image alt/text (maybe caption?) text. Could you give an example or two?
How to Improve SEO Performance in Backdrop CMS