What a link in bio is for
A link in bio is built for variety. Social profiles send you a mixed crowd: some fans want your newest video, others want merch, others want to stream a release or join your community. A link-in-bio page holds all of those options at once and lets each visitor pick. It is the right tool when there is no single next step that fits everyone, which is most of the time for a creator's everyday bio.
Say your latest post mentions a new song, but a chunk of your audience is really there for your Discord or your shop. A link in bio serves all of them from the same page, without making anyone hunt.