The problem is that a license is overridden by local law if there is a conflict. For example suppose that there is a law saying there is an implied warranty that goods sold are yours to sell, and you sold a stolen good "as is". In that case the law wins and the buyer can still sue you for having sold tem stolen goods.

And as https://www.klemchuk.com/legal-insights/warranty-against-inf... explains, a common local law is an implied warranty against infringement on others' intellectual property. Which a copyright violation would qualify as.

As always, I am not a lawyer, and this is not legal advice. If something like this arises in practice, you should consult a lawyer familiar with the laws of the venue that the case will be decided in to find out whether any laws apply, and to what extent the generic liability disclaimer won't actually provide protection.