Defederation is an important tool and is part of what makes the fediverse work. In my experience, people who are strongly defederation averse are mostly either quite new to the fediverse or have the relative privilege of never having to really deal with bad actors especially en masse.
Some shoes are able to be resoled/rebuilt by a cobbler when they wear down, but they have a more complex/handcrafted construction which means their price tag is higher, and of course it’s not free to have them resoled, so you don’t automatically save money by going this route.