How do you even get in these other domains if all you’ve done is web dev. It would seem from what I’ve seen, that many of these “other” domains get their newbie

How do you even get in these other domains if all you’ve done is web dev. It would seem from what I’ve seen, that many of these “other” domains get their newbies primarily from things like University hiring pipelines, and everything else is Senior/Principal/Staff/Whatever where you need to be established in the domain.