That’s part of what drives iNaturalist but it’s not the whole story. The primary function of iNaturalist is facilitation of learning about nature and biodiversity. The sciencey bits are a secondary (albeit important) aspect. It works by permitting conversations between its members, some as brief as posting an observation and receiving an ID and some as long and winding as this forum topic.
People don’t just use the resource, they contribute to it. It’s a community, with all of the pluses and minuses that go with that. It’s a community that exists within the context of technology provided by a non-profit with a management structure and rules, but a community nonetheless. On the other hand, the word community is derived from the Latin root communis, which means common.
Speaking for myself, I stick around because I enjoy the company (mostly) as much as for the resources. I don’t think I’m alone.