what about adobe though? what if you work in a field where you are forced to use a certain proprietary file format or software? this sounds a bit naiive. go talk to real johnnys :-)
In any event you can slowly move away from using a companies products. It isn't a all or nothing proposition.
Dude, if you're a professional graphic designer, you're using an Adobe workflow. The amount of friction that you would encounter in your daily work for any other choice is simply too high.
You can't have the cake and eat it too.