Not to defend leakers even a bit and Nintendo has every right to go after them legally. However, the emulation crackdown is just Nintendo flexing their legal team on small devs who’ve done everything they can to discourage leaks from spreading within their limited reach. It’s 100% on Nintendo and they themselves are acting in a legal gray zone to bully 3rd parties into giving up. If any of the emulation teams had the resources to simply deal with big N, the situation would probably look a little different.
I guess what I’m trying to say is, yes leakers are in the wrong but no, they didn’t kill emulation with their actions even when it provoked Nintendo.
In 1999, Nintendo got a woman in Japan arrested over - and get this - sharing erotic fan art. I’ve read they also might’ve sent private detectives to stalk after her before the arrest, but couldn’t find anything quickly. Anyway it sparked a big shit storm and a debate about what copyright holders are allowed to do, legally and morally.