In my experience this is a US phenomenon. I am a lawyer in a different common law jurisdiction where corporate personhood is pretty much uncontroversial. Everyone knows that companies can deal in and own property, can enter into contracts, can sue and be sued. There is no real public debate about it. It seems to be controversial in the US because of the Citizens United decision.
I have to admit I don't fully understand the significance of the Citizens United decision. I get that it was based on the idea that corporations have the same rights as people under the constitution and that its effect was to increase the influence of money in politics. But if Citizens United held that it's illegal to restrict corporate spending on politics, presumably it must have already been illegal to restrict individuals' spending on politics, so presumably wealthy individuals could have spent their money on politics anyway (the only difference being that it's slightly less convenient when you can't use a corporation)?
If my understanding is wrong I'd be grateful to be educated.