Valve's justification for an exemption according to that letter I linked above was that Community Hub was an incidental side feature of Steam. Essentially the same argument that got GitHub an exemption. I even agree with them.
An overall age verification strategy for all online content would answer the question though.
I've come at the situation in the context of the social media changes, because that's what Valve cited in their letter.


Usually, the Australian Prime Minister and the US President meet several times a year - between G20, APEC, or just regular visits.
This term, Albo has been to the White House once. That's the only time they've met.
Likewise, Senator Wong (aside from the inauguration/meet & greet) has been to the USA once. Again, that's well-below usual levels between our two nations.
Relations remain cordial, but by any objective measure, they are nowhere near as close as usual.