My poor fellow. You wrote about how something is a bad tool for a long list of serious reasons. Then it failed spectacularly because everybody decided to depend on it anyway - exactly what you were cautioning against. But somehow you have to respond to people who think you are the one who got it wrong! As a third party the whole affair gave me a good chuckle at least ;)
Even if example.com is unsigned, the delegation from .com to example.com will still be signed (including an attestation that example.com is unsigned). So lack of DNSSEC adoption by users of the TLD wouldn't save them here.