Last two paragraphs of the article:

For most people this‘ll be, so what? — they still trust Google and Microsoft with all their stuff. But Proton’s whole pitch was much more than that. And Lumo walks that back a long way.

Proton’s Lumo chatbot is a pile of openwashing and securitywashing using Proton Mail’s previously solid reputation to sell you something where the security is: cross your fingers and trust us.