How would it benefit the open source community? They would be proprietary binaries, likely only on one architecture.
I'm of a different persuasion: better to not have Adobe software on Linux. It'll give a bit more space for alternatives (as it's already doing), and Cthulhu knows we need that. It's not perfect, but it's a start.
Adobe needs to go away.
I don't see how more proprietary software is something the open source community wants.
If Adobe made their software available on Linux, that would allow many people to migrate, which would in turn help expose those people to lots of other F/OSS software, which would then build up their userbase over time.
None of this would happen instantaneously, of course, but there's a precedent for this sort of "small" change causing large shifts. For example, OS X having a unix foundation was the trigger for the gradual (but eventually large-scale) move of software developers towards macs.
I use a mix of proprietary and free software at any time.
I guess most Linux users are like me: using it mainly because (for me) it provides a superior experience all the way from installation, through painless maintenance, fantastic desktop usability (for me) and extremely much better performance.
The last one is worth emphasizing:
1. the compiles are relevant for me are consistently around 30% faster on Linux
2. starting executables (and this includes git) is so much faster that using anything else afterwards feels just dumb.
In practice, I perceive some (highly deserved) sarcasm towards Adobe.