Can you give an actual example of this or are you just making a broad accusation against anyone that uses something other than Proton?
The quote you are referring to is about people who have such specialised security needs that they choose to self-host. i.e. its about people who won't use Proton because it doesn't suit their needs. The only 'accusations' in the post are against Google & Microsoft, who are accused of buying the souls of their users and selling their data - which I think is a fair accusation. No other company or service is referred to, explicitly or implicitly.