That's not strictly true. There is a gray area where you are allowed to transform the work into a format you can consume. For instance, the blind use machines that turn books into spoken audio, and even if the audio book exists, they are still allowed to do this transformation. Because of this, there is a gray area where you might be allowed to purchase a work, then obtain, through a third party, a pre-transformed version of the same work, especially in cases where you cannot transform it yourself without great expense, or cases where you cannot consume the original form.no matter how many times you have paid for it and in what forms, you are still not entitled to it in other forms
This is one of the reasons those who created DVD cracking programs were not always successfully prosecuted - there were some computer systems that were not able to play DVDs and there was no commercial, licensed software available for these computers, even though the computers had DVD drives. Legally a user could use the software on their computer to consume the DVD contents without having to purchase new equipment (DVD player and TV).
In general, you are correct, but there are situations where your statement is not true, and there's still a rather large gray area between the rights of the owner versus the rights of the consumer.