Why do I need to de-authorize a computer for a program, which I do not use on that one?

[GNNyman]

I have two different main interests - I record my piano playing and work with PS2020 and Lightroom on my Astrophotography. For these tasks, I have three systems - one solely for music, working with Audition (Macbook pro), one only for photography (Windows 10) and one iMac on which I have both - Audition and PS2020 active. If I now want to record my music, I have to de-authorize my Win10 Notebook - despite the fact, that Audition does not exist on that computer. And vice-versa - if I want to work with my Win10 Notebook with Lightroom and PS2020, I have to de-authorize my Macbook on which I got Audition.... why?
I understand, that one program can only be authorized on two computers at the same time, but these are different programs!

Can someone please explain this for me? I do not see any reason why I have to do this?
Thanks and regards

Georg

[Peru Bob · Accepted solution]

It is different programs, but it is the same subscription license.  One account allows two computers, regardless of programs used.

[Test Screen Name]

You can’t split the package. 

[GNNyman]

Thank you all for your answers - I do understand the situation now..... well, I think, I have to live with it -