I'll believe that companies are the legal equivalent to persons when Texas executes one of them.
Can you find a company that committed capitol murder? Or are they supposed to just execute one to test your theory, even if they're not guilty?
That's not true. Yes, corporate personhood exists to make things like forming a contract with or suing a corporation possible without a whole bunch of extra laws. But corporate personhood is not declaring corporations totally equivalent to natural persons. Corporations, for example, cannot vote or get married and probably can't adopt kids in any state.
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.
The ones that were created in the US over eighteen years ago and haven't been convicted of a felony can. The same is not true of corporations, because they're not legally equivalent to humans.