Falcon 9 has easily enough market launching commercial satellites to keep it flying outside of Starlink. It's the most efficient launcher in the world from a cost perspective. Falcon 9 was making money before Starlink existed.
2025 report https://spacedaily.com/t-spacex-launched-165-falcon-9-rocket...
123 Starlink / 42 commercial. Almost 1 commercial launch per week. I don't think any other launcher does 42 launches per year apart from china.
And the way F9 enabled Starlink is spectacular - a money printing machine on itself for SpaceX.