The power-meters topic is pretty intriguing, I agree.
First, my impression is that Prudhomme wants to show the fans that they'll do everything in their power to make the race more exciting.
Second. there are numerous issues related to the usage of the device. Banning them now won't be the same as if it would've been the moment they were introduced to the sport. The power-metric training method shaped the performance of majority of current generation. It has learnt them, in a way, how to ride, thus many of them can race without relying on the data.
On the other hand, riding without digital assistance could make them more wary and insecure about their condition, pushing the racing towards even more conservative side.
Taking everything into account, I support Prudhomme's intention.
Let's see what happens... but it comes down to the UCI.