Actually, I think it is a great exercise, literally or just figuratively. Kind of like that advice columnist who advised a woman (who wanted advice on how to get her boy to quit being gay) to show her son how easy it was by changing her own orientation for a month. Lead by example, parents.
If someone could show me the way to be comfortable and happy in my biological body and societal role, I *know* I would be interested. Especially considering I tried really, really hard in a lot of different ways for 39 years. I'm facing a lot of expensive and painful treatments as well as a whole lot of adjustments in order to *be* comfortable and happy with the way I present myself and behave. So yes, CIS-gender person who doesn't believe in transgender issues, please show me that gender is a choice by simply deciding to change. And then have all your friends do it, then their friends.
I guess that's one of the reason's I'm a fan of the "Walk a Mile in Her Shoes" events to promote understanding, when men are challenged (and many do) to walk one mile in high heels. It would be lovely if we could orchestrate some kind of awareness campaign, not to trivialize transgender issues, but to promote understanding. National Gender Swap day, perhaps. I know, I know, it's probably a non-starter, at least now... But it's fun to think about, and it may catch on when Gen Y is in the management seat of government and business...
Meanwhile, I'll keep dreaming and working to make my dreams come true for future generations.