1) Trump's the one who ultimately made the shutdown decision. Actually, state governors around the country have made that decision. Fauci is there to give a medical opinion, and that's what he's been doing. He isn't supposed to be taking economic considerations into his analysis - that's for others, the decision-makers, to decide. Fauci is a voice that should be in the room, not the ultimate decision maker.
2) It is more deadly than the flu, particularly for old people. That's just false. Hospitals don't get overrun by seasonal flu.