@trwnh lolsob. This is/was the whole point of webfinger ("It's DNS, for people") but the mastodon implementation kind of missed that part. But it's trivially possible to do that.
My ideal is to have one "personal address" [per life context, e.g., work, family, social, etc] that points to different stuff I'm sharing in different contexts, with tagging to indicate in which contexts it the various feeds/etc might be useful. e.g., a tech-focused mastodon feed, a pixelfed feed for family, etc.
@trwnh .. and *critically* for what I think you're saying, there's nothing preventing linking from a webfinger profile to e.g. a wiki or a webpage of any sort, or another identifier like a phone number or a signal account. Again, this is all stuff that informed the original design of webfinger, over 15 years ago now 🙈