Everything is politics. Politics is part of everyone's life, and affects everyone's life. Some more than others, and some have the good fortune to not have to face that fact every day.
Inviting politics where it does not belong particularly harms vulnerable populations, because politics is about the use of power and force. We agree to leave our politics at home in many realms of life, and this allows us to band together regardless of our political differences to prevent greedy and powerful people from exploiting those realms.
The political axis may be invisible to //you// because you are privileged. A bathroom is political. Food is political. Education is political.
The Trump administration had plans leaked this weekend that stated their intent to change the definition of "gender" so that trans people would not exist to the Federal Government. I'm sorry, but being able to keep politics separate is a privilege.
If you abandon it, then it gets much easier to silence unpopular voices -- the cab driver won't take you to the protest march, your ISP shuts down your advocacy domain, facebook bans your support group, all because your politics conflicts with theirs. Total political war is bad for everyone, especially those who are already unpopular.
But do go on...
And for all the things you mention, I support making them less political rather than more, and so should you. Finding an example of a politicized aspect of a thing is not an argument that it should become more politicized.
The problem is that it is often turned into a politics.
The logic of this kind of identitarian social critique, insofar as it becomes political, is decidedly illiberal.
It is authoritarian.
But all of this is nothing new! In fact it's about 30+ years old.
It originates in the aftermath of the failed revolution of the 1960s--in other words, it appeared as a phenomenon of the dissolution of the New Left in the 1970s-1980s.
Some see its origins in the Maoist practice of self-critique. I think it's better understood as the response to the realization that the New Left's politics was no longer viable--that its historical potential was completely exhausted.