I think the DTC companies mostly can't build the moats needed to make that kind of money. So I think a reckoning is overdue. But once key players can no longer subsidize each sale, we'll find out for sure where the store-vs-DTC balance is.
My personal guess is that plenty of people will keep buying DTC goods, and that many categories will be more than competitive with brick-and-mortar competitors. So I expect DTC mattresses will be a good business, even if none of the current big players survive the culling.
Buying a foam mattress on Amazon sounds like inviting some sort of toxic mess of outgassing junk into your bedroom. No thanks.
DTC at a 40% discount from "I can buy it walking into a show room staffed by a dozen salesmen in a Manhattan shopping district" is not enough of a discount. Make a discount 85% of that every damn day and we can talk.
Based on the data, I think we can conclude that opacity and user hostility are insufficient criteria for a DTC play. (Unless consumers are willing to pay a premium for the removal of said opacity and hostility.)