The correct response here would be for Robinhood to cancel the product and apologize, instead of revamping their marketing materials.
They are not offering a "cash management" service. Unless they get insured or find another vehicle to prevent funds from being at risk, they are effectively just borrowing money from their customers.
This is sardonically innovative, as they've invented the retail investor equivalent of a revolver[1].
If they continue to market this without deep protections for consumers, this is effectively a scam and I would encourage anyone originally considering this to scuttle their considerations.