You're trying to argue that DNSSEC isn't exposed to HNDL attacks, so can use signature algorithms that CRQCs break. But that's neither here nor there: the approaching cryptographic research consensus is going to deprecate all ECC (and all RSA); yes, signatures aren't the priority for immediate removal, but nobody is recommending ECC signatures. The point is all this is happening just as ECC in DNSSEC may finally be stabilizing.