That would probably not be the best strategy for those plants that need animals to help them reproduce. Animals and plants could co-evolve, yes, but getting there likely is slower.
Also, Wikipedia (http://en.m.wikipedia.org/wiki/Bamboo_blossom#Mechanism) mentions a competing theory: "the fire cycle hypothesis, argues that periodic flowering followed by death of the adult plants has evolved as a mechanism to create disturbance in the habitat, thus providing the seedlings with a gap in which to grow. This argues that the dead culms create a large fuel load, and also a large target for lightning strikes, increasing the likelihood of wildfire. Because bamboos can be aggressive as early successional plants, the seedlings would be able to outstrip other plants and take over the space left by their parents."
Also, Wikipedia (http://en.m.wikipedia.org/wiki/Bamboo_blossom#Mechanism) mentions a competing theory: "the fire cycle hypothesis, argues that periodic flowering followed by death of the adult plants has evolved as a mechanism to create disturbance in the habitat, thus providing the seedlings with a gap in which to grow. This argues that the dead culms create a large fuel load, and also a large target for lightning strikes, increasing the likelihood of wildfire. Because bamboos can be aggressive as early successional plants, the seedlings would be able to outstrip other plants and take over the space left by their parents."
If that is a factor in synchronized blooming it only can be beneficial for those plants that are pioneer species (http://en.m.wikipedia.org/wiki/Pioneer_species)