It’s probably not my place to chime in, but I’m gonna 
I’ve seen lots of people mention that tools are there to be used, but a lot of these same people turn around and say filters are bad, or stock effects are cheap. I’d like to refine the thought a bit… if everything is a tool (and everything is fair game), then I propose that the art is in the use of the tool or technique.
For example, in another forum, we’ve posted many limited challenges. Things like only using filters, or worse, only using lens flare in Photoshop. The challenge starts out as an excercise in restriction, and blooms into fundamental creativity which is borne of that restriction. By taking away distractions like brushes and other basic tools, the artists are forced to learn control over something they usually waive off with derision.
The point of these challenges is twofold: understand the tool deeply; look around for new ‘tools’.
So, I can’t consider anything ‘cheating’ that is used with purpose and intent to create (as opposed to copying or otherwise deceive). I feel it’s all in the intent, and this applies to styles of art as well as technique and choice of tools.
As for the argument that using dodge/burn or filters is obvious, all I can say is ‘so what?’ If you look at a work and you can tell because of your own experience that someone dodged a bit to enhance a highlight, but it looks good, who cares? Other viewers or artists with different backgrounds may not know. Going further, if you look at a classical painting, you know a particular shade and stroke were used, but that’s not considered cheating. It’s control over the medium and the tools… mastery in art.
Steven beat me to the punch!*