Hum... Why does the guy who discovered the time of quantum decoherence (Claude Cohen Tanoudji) says quantum computing might be a scam? Okay, people may think

Hum... Why does the guy who discovered the time of quantum decoherence (Claude Cohen Tanoudji) says quantum computing might be a scam? Okay, people may think he is a fraud, but he was able to trap very few photons in a cavity and measure that quantum decoherence disappear with order of magintude of 10^-13seconds. Ho! And maybe quantum computing is fast, but how fast is it for an operator to translate a NEW problem (different from factorisation) into a quantum code? Well, least but not last, reading the libquant (freely inspired from quantum mechanics to compute risks) I can't help that notice that most so called smart boys with degrees in maths are totally clueless about quantum mechanic, because quantum mechanics is based on probability, and most human don't grasp it. So how can I trust less than able non -as smart and honest person- as traders to grasp QM?