My thoughts exaclty. I read the Lightroom Feedback site @Conrad C cited. Amongst professionals there is an unwillingnes to use Linux exactly because software like Adobe's is not available for Linux. The OS had matured enought and keeps improving, so if you bring the software, people will have many more reasons to use Linux.
Indeed there are too many distributions and market segmentation, but software can be designed to be distro-independent. Lightroom is a very good example of OS-independent software since a lot of parts are written in LUA and many others are available for Linux too.