Non-curators can only edit places they create. Curators are supposed to also be allowed to edit any non-standard place. However, some non-standard places are not editable even by curators. Two examples:
I agree, this has been a wide spread, long standing problem.
I’ve been trying to get Charlottesville edited for about a year now to no avail. Both “Charlottesvilles” are non-standard places that are incorrect to some degree (discussed in https://forum.inaturalist.org/t/duplicate-places/2909). We don’t have the ability to edit either of them.