I dunno about that. IME, python is much, much more universally installed on the hosts I've worked on. Sure, usually it's 2.7, but it's there! I've tended to work on rhel and debian hosts, with some fedora in the mix.
(Once had a coworker reject a PR I wrote because I included a bash builtin in a deployment script. He said that python is more likely to be installed than bash, so we should not use bash. These debates are funny sometimes.)