[Cockroach Labs engineer here.]

Yes, if very low-latency (i.e., P99 latency sub-5ms) reads and writes are critical to your application, CockroachDB should not be your first choice. That said, one of the primary motivations for CockroachDB is that most existing systems don't handle eventual consistency well. In our experience, most developers will eventually write code that assumes a consistent database, either accidentally or intentionally, because it works most of the time. Dealing with eventual consistency is hard.

Rather than "if you can work with eventual consistency, you should look elsewhere," the sentiment we're trying to cultivate is "if and only if your performance requirements can't work with strong consistency, then you should look elsewhere."