Indeed, a couple of GUI forms on top of curl is right up there with electricity, antibiotics and sliced bread.

Silently installing hooks into your other tools, to route their traffic through Postman without your knowledge or consent, is not at all reasonable.

How you try to make money off an invention may be perfectly reasonable, or it may be perfectly unreasonable. The "how" matters here.

People hating you for the damage you cause while making money is also perfectly reasonable.