In theory, the benefits of the structural integrity of bamboo should do a better job at controlling cabinet ressonance over MDF. However, it comes at a greater cost of being more expensive and more difficult to work with. Just the simple task of drilling holes can become problematic/more difficult when assembling the loudspeaker. Economics is simply the reason you don't see it too often used.

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne