Instagram gets you followers. SEO gets you bookings. The difference is intent. A couple scrolling Instagram is passive — they might love your work, they might forget it by lunch. A couple searching "wedding photographer Austin" is in the market right now. They have a date, a venue, a budget, and they're actively comparing photographers. Being visible when that search happens is not the same as being visible at all.
The other issue is ownership. An Instagram audience is rented. The platform changes the algorithm, reduces your reach, and there is nothing you can do about it. A page that ranks on Google keeps ranking without your daily attention. Referrals dry up between seasons, slow down when your network is still small, and cannot be scaled. Organic search — done right — compounds. It's the only channel in photography marketing that gets more valuable over time rather than requiring continuous reinvestment to maintain.
That doesn't mean abandoning Instagram or stopping work on referrals. It means treating SEO as the channel that keeps working when you're not. Instagram is a spotlight. Search visibility is infrastructure.