Yes I think it to be so. Without proper context trending demonstrations feel misleading.
In an actual fly, synaptic patterns emergent inside the connectome topology is an n-th order effect of the fly trying to maintain a set internal parameters (homeostatic regulation). The generative property of its brain that leads to the actual behavior should be dependent upon a brain structure designed for a very particular type of computation. I think it does not have rich enough brain organization to make it possible to learn play Doom or trading.
I doubt that actual fruit flies can learn to play Doom or trade on the stock market? You can train a network with hundreds of thousands of neurons to do all sorts of interesting things, but I am not sure that the fruit fly connectome is a model of fruit fly behavior?