The ISPs are compelled by judicial order to take down whatever LaLiga tells them to, and LaLiga is telling them to block the entire IP range. They can’t not do it.

From vague recollections of previous times this came up, I think this is downstream of the providers getting blocked refusing to cooperate though?

I know when eSNI / ECH came out, Cloudflare at least made a point of taking about plans to use it to frustrate targeted blocks in hopes that governments would be unwilling to respond by escalating to blanket IP blocks.

Presumably there's no legal reason why the ISPs couldn't write to all their customers giving "notice of upcoming partial internet service outage, due to the actions of La Liga". It would be factually true

Of course, LL could still give them hell in court even on false grounds (and maybe even win anyway, given the case detailed in the root comment). And in any case there's simply no commercial reason why they would stick their neck out in the first place

I think most of this are being done in the moment, without advanced warning. Plus, some ISPs carry soccer in their TV offerings so they’re probably not benefiting from speaking out. At least, my ISP does replace the blocked website with a notice explicitly stating that this is the result of a judicial ruling in favor of LaLiga