I don't think discussing the limiting principal behind your stance is waxing philosophical. We live in a liberal society that generally upholds free speech, that society is made up of institutions, corporations, and individuals; arguable, CF is more important because of how information is currently distributed than even the ACLU or public defenders but I'll bite and put the philosophy aside.

Here is a more direct question: why is it a good idea for a company to exercise censorial power if the content is not otherwise illegal? Reminder that we are talking about companies that run infrastructure not something like Twitter that hide behind BS "community guidelines"