The problem with reimagining the role of publicly funded institutions and ascribing a new "ethos" to them that is not supported by the public is that funding gets cut and libraries get shut down.
If you want to know the original ethos of libraries, it was to disseminate knowledge at low cost to members of the community. Not to be socially inclusive. Not to make people feel welcome. Not to provide "safe spaces". But to provide access to knowledge. By subverting this ethos, we have also subverted a lot of the funding model and political support, which is why libraries are having a difficult time right now.
it was formalized in the 60's but there was a precedent going back AT LEAST to the wild west.
You're clearly a right wing nut (since "libraries are more than buildings with books" is something you find "poltiical" and facts are something to be rejected), just come out and say it.