Another excuse, perhaps more persuasive, is that this policy is necessary for our own protection as well as the safety of the immigrants. We must match incoming flow rate to our capacity to process and assimilate them safely and humanely.

Again, it's unlikely to be persuasive because our capacity to process these applications is entirely within our own control. We don't have to underfund and understaff our immigration courts - or even have these thing go to immigration judges rather than administrative panels. A country that locked people in prison without trials would be clearly violating their human rights, and they wouldn't be able to point to a deficiency of criminal court capacity as a justification for not giving people a trial.

As a short term, temporary measure (again) you might be able to justify it. Refugee flows spiked hard during the Trump administration (before Covid), and continued once the emergency phase of Covid was over. Our system doesn't currently have the resources to match the incoming flow, and it takes some amount of time to spin up more capacity. So maybe - on a short-term basis - violating the human rights of those asylees for a few years is justifiable. But that argument doesn't hold water except as a short-term measure. Again, hence the sunset clause.