I don't know what I think about the fairest way of accommodating athletes with DSD in sport. It's not my area as I don't really like sport - it's all just PE to me.
I do think we should be extremely careful not to use people with DSD to make any points in discussions around gender identity given that they have asked repeatedly not to be dragged into the gender shitfest. We spend enough time telling TRAs not to do that.
Anyone born with a cunt and subjected to female socialisation through childhood is a woman as far as I'm concerned, regardless of whether they have a y chromosome. Not everybody will agree with that and that's fine.
Why are we being pushed to accept that any rules designed around athletes with DSD should also apply to trans athletes? The context is completely different. DSD are rare, especially those which give apparently female athletes an unfair advantage over XX female athletes. You can't self ID as having a DSD, despite many tra's trying - these are medical conditions for which there are verifiable tests.
I don't know what's fair in this case and the IAAF statement seems nonsensical to me but any bespoke solution designed around athletes with DSD has nothing to do with unequivocally biological men taking over women's sport and we should resist this conflation.