Many CDs, no CD player (a question about ripping CDs)

Quick and basic and general question: why would someone rip a CD for storage as a digital file if they have access to the same album on Qobuz? 

In some ways I'm asking: in general, is there any difference in sound quality between a digital file (ripped from a CD) that is played through a streamer and the same album (same release) on Qobuz, played through the same streamer?

Obviously there are all kinds of variations and exceptions; I mean this as a general question. Of course we all have CDs that aren't on Qobuz and we may want digital files for times when we're away from our main systems or don't have access to the internet. I'm simply trying to understand if I want to rip a CD if I can play the same album on Qobuz.

Thank you all, as always!