This has nothing to do with nostr. nostr.build is a centralized media hosting service, just like imgur, where you can host and share media with others. If they don't approve of what is saved on their harddrives, they are perfectly entitled to remove it if they want to. If you don't control the source of your text or media, don't expect it to be censorship resistant.
Discussion
I understand all of that, well then they shouldnt be build within nostr just saying
So by that logic, relay operators shouldn't run relays if they want to ban certain accounts, kinds or content on their relays?
You need a moral compass here. Do you support pornography?child porn? This doesn't benefit any community(unless we count perv).if this photo is uploaded then censored(covering blood or someone got their head sliced off) I don't think that's bad. I wouldn't want to see that. If someone was reporting animal abuse,and their a story to tell I think it would pass.but if you just post abused photos with no context, it provides no benefit.