Is having a scattered user base a sign of bad product market fit?

When your product gets signups from completely random places like a freelance designer, a corporate HR manager and a college student all using it for different reasons it feels super confusing at first. You start wondering if you failed to target the right audience. But sometimes it just means the core bottleneck you fixed is universal, even if people apply it differently.

For those whose early users came from completely unrelated fields did you end up picking a specific niche later on or just let it grow organically?