If I agree with you: Yep it sure is, and that's perfectly ethical for personal and corporate use. To businesses, they have a responsibility to filter what goes in and out of their network, in the interest of their customers and themselves.

If I don't agree with you: Do you think IP/port based firewalls are censorship? That any kind of cyber-border security is an affront to rights? If not, then how do you govern access as a private organization when everything is tcp/443 on AWS? Gotta know what it's going to.

Just like a kitchen knife, purpose and intent set the tone.

I am considering it as a tool to provide another layer of protection for my small business network. That would make your summary a positive for me.

It has that potential, and I'm sure that's part of the business case for it (along with the more likely concern about exfiltration of data from secure networks).

Or it could be privacy software that lets you look at data you're sending to the cloud, modify it, or prevent it altogether.

It just depends who is in control of the software.

Censoring the viruses and malware and credit card thieves from making their voices heard