It's really no bid deal. The profile on Nostr is already for them to add as many fields as they want. Many clients have this option to allow users to express themselves as fields. The one on amethyst is literally just 10 or so lines of code. It took me less than 5 mins to add. it's not really any burden.
To me it is way more important that users can express themselves in anyway they, and only they, see fit.