That is not clear at all from your first post. All you did was ask about the current state and postulate that python2 should be commonly installed nowadays. Then wonder if python could be made to act like a shell. None of that indicated you were thinking about some hypothetical parallel past timeline.
In our timeline python 2 is EOL and not installed by default on much if anything these days and should not be used by anything any more (despite some things still needing it - they really shouldn’t any more).