I have never used miniconda3 (I am not a big fan of python to begin with so I do not see why I would download more stuff for it 🍌)

But there is some fear, if it updates the default alias, as many systems are configured to call python to run python2.7 scripts so if you are on a misconfigured system (a lot are) then you run the risk of many system errors if this method overrides the default alias.