In this case I'm included. Python is not my first, second, or third love. But it is the most available and the simplest tool available to glue things together. CSVs, json, web apis (private and commercial), etc., are all so easy to do with Python.
So my guess is that there are a lot of users who may not even realize the benefits that Python3.x gives vs 2. "We" don't know or care about features we don't need. But we do feel the pain of modules that only work for one version.
In hindsight, I would have voted for a hard break from 2->3 perhaps 2 years ago. I suspect the ultimate human time effort would have been less than we waste now straddling or stumbling with two versions.