How do I explain to a smaller sibling that spending money to build a pc exclusively for emulation is a retarded idea?

How do I explain to a smaller sibling that spending money to build a pc exclusively for emulation is a retarded idea?
They won't listen to reason

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She'll listen to rape
Nice ID dubs

Whats so bad about emulation? Certain emus need a powerful pc so…

How does she intend to play only emulation on it? Why would normal PC games be a no-go? If her current hardware can't into PCSX2 and she's preparing for the PS3 emulator it's not that retarded to upgrade, but surely it would also benefit from conventional games.

why is it retarded?

What, do they intend to stick it in a fucking arcade cabinet or something?

It's not retarded though, do you even know what you are talking about ?

...

Like, if she wants to emulate something bigger than a PS1, sure. Also, gotta have mass storage for ISOs, nigga.

its like you are a console cuck or something