Not all natural persons can vote. Despite what Trump says, green card holders are disallowed such.
The trouble, I think, is that some people want to keep corporations, but to somehow keep a leash on them so that they're only weaponized against their enemies. If you truly hated corporate personhood, instead, you might start talking about how corporations shouldn't be allowed in any circumstances. You can't keep a leash on them. They're effectively immortal, enormously rich beyond even billionaires, and have agendas. Like, I'm not exaggerating... they have agendas, and can play a long game. You'll never politically neutralize them as long as they exist, and unneutralized they will just continue to chip away until they've got their legal personhood back.