So, if you rent a car, does that mean its OK to drive it around the corner and sell it to someone else? you paid to get hold of the car, so it's yours, yes?
Oh, wait, no it isn't. You paid to rent it for a finite period under certain conditions, and signed a contract to that effect. the same is usually the case where software is concerned, but since you don't like the terms of the software contract too much, you feel free to ignore it, and redefine your licensing of the software as a purchase, granting yourself all kinds of new rights which the original creator never intended to give to end users. Now, you're welcome to say that software is way overpriced or those terms are so onerous you refuse to comply with them, a point of view I have some sympathy with. But at least be honest about the fact that you're choosing to ignore the contractual terms offered by the licensor and agreed to by the licensee.
edit: I don't mind being downvoted, but at least point out why you think the argument is flawed. Otherwise you're just blaming the weatherman for telling you that its raining.