ISO is a "traditional" international standards body whose members are sovereign entities (well, national standards bodies on behalf of those sovereign entities). If they'd like to pay ISO to give this stuff away I'm sure that would be fine.

Conveniently your government (as one of those sovereign entities) also decides what the laws about "intellectual property" are where you live. If you live in a democracy of some sort, this is in some sense up to you.

But if you live somewhere with like, poverty and kids dying of preventable diseases and so on (which you do, that's basically all of the sovereign entities regardless of whether they've got democracy), I can already guess why they didn't fix those, and the reason to not make ISO standards freely available will be similar: That would cost money.