Of course they can be learned. As a case in point, consider South Korea between MERS and Covid. MERS wasn't even that serious, in comparison to Covid, but South Korea wasn't happy and held an enquiry into pandemic response.
The result is that the outcome there has been among the best in the world, and even when a second wave threatened to blow up there, nothing came of it and a country with a similar population to the UK has had only 33 deaths per million, compared to around 60 times that.
The idea that a similar exercise here would be worthless is ludicrous, not to mention surprisingly pessimistic of the UK's ability to improve. And in any case, it's always worth trying to be better.