Good faith actors want to serve a market. Bad faith actors want to exploit it. If you are seeking out a way to hide information, you are part of a market that

Good faith actors want to serve a market. Bad faith actors want to exploit it. If you are seeking out a way to hide information, you are part of a market that is signalling you have something worth hiding (to you, at minimum). As a bad analogy, it's a bit like putting up a sign in front of your house that says "We went on vacation, but the door is locked!"... basically, begging to be exploited. Short of regular, independent audits, you are mostly reduced to guessing who to trust, and even then (as demonstrated by Lavabit) the trustworthiness of the actor isn't always the only relevant factor.