The algorithm doesn't work for you
Instagram, TikTok, and every other feed-based platform are built to keep people scrolling, not to help someone find your best work. Reach isn't consistent, it isn't yours to control, and it can drop overnight for reasons that have nothing to do with the quality of what you posted. A collection that took years to build can become nearly invisible the moment the platform decides to change what it promotes.
What a portfolio needs to do that a feed can't
A serious inquiry — a gallery, a client, a grant committee, a press contact — needs to see your strongest work in the order you choose, with the context you choose, without wading through unrelated posts, ads, or a chronological feed that buries a three-year-old piece under yesterday's story. A portfolio is curated on purpose. A feed is chronological by design. Those are different jobs, and only one of them is built for someone deciding whether to hire or represent you.
An owned site also survives outages, account flags, and platform shutdowns — all things that have happened to real accounts with real audiences, with no warning and often no recourse.
Instagram still has a job — just not this one
None of this means abandoning social media. It's genuinely good at discovery, community, and staying visible day-to-day. The fix isn't choosing one over the other — it's making sure the platform is a doorway into something you own, instead of being the entire house.