Honestly, I could see the argument either way.  Take the 'website' field for example: it's not a field I personally really care about; but, I suspect there are enough people who do to support it being standardized.  Otherwise, users could be forced to maintain both the customized 'website' field that some popular apps choose to use AND the customized 'URL' field that other popular apps choose to use. 

 This field has tripped up a number of folks bc it is distinct on Primal and not on other apps, so if a user enters their website on Primal thinking it will populate across the network, they will find that it doesn’t. 

Most protocols have standards, it would be helpful to get a baseline established for things like profile and kind 1 notes as well as links.