Why were so many French sailors sent ashore?

Were so many sailors ashore because Napoleon misunderstood the logistical risk of losing the fleet?

Brueys had offered extensive naval support ashore because of his commitment to Napoleon and the expedition.

Brueys offered extensive naval support ashore because he was devoted to Napoleon and wanted to help the expedition. The immediate decision to release sailors lay with the admiral. His eagerness to support the army explains why naval manpower had been sent away from the ships.