[hhw]

Because with presumably feasible level of efforts and resources, you can make a claim that's not yet true, but has a reasonable probability of becoming true by the time you need to deliver your product/service. So you can make that claim in good faith, even if you're not 100% certain it will hold true.

That's very different than making a specific claim that you already have a feature right now, that you in fact don't. That claim cannot possibly be made in good faith, as it's currently outright false, and you can never retroactively apply end to end encryption on conversations that have already happened.