message signing – Why does blockwide signature aggregation prevent adaptor signatures?

In a recent video about half signatures, Jonas Nick mentions that blockwide signature aggregation interferes with adaptor signatures and offering atomic swaps (I guess via PTLCs).

I am confused about what breaks in that case. Do I understand correctly that the main issue is that the signature depends on the adaptor secret? If so, the transaction (including its signature) would already be fixed in the block anyway. The only other intuition I have would be that it might hinder a non-interactive protocol for adaptor signatures, but that also doesn’t seem obvious to me since, as far as I understand, blockwide aggregation would be done by the miners at the very end after all signatures are presented.