> I think it's dangerous when platforms function like a public utility and is yet allowed to do whatever it wants because it's technically private property.

I agree with the direction, but that is the core of a bad argument; if a principle doesn't apply in important cases then it isn't really a principle. It is exactly the same as the "free speech except for things I don't like" crowd. Companies can and should have the power to choose who they serve.

Corporations making decisions about who they serve based on the character of their customers and pressure from intolerant groups is indeed a highly risky political strategy. But the risk is from the power of intolerant and their ability to declare it a 'good outcome' rather than from the corporations themselves.