What you might mean is that the carrier's draconian probabilistic anti-spam system incorrectly categorizes them as spam. And that this causes a practical problem for Twilio, which lacks any recourse against said carrier's incorrect classification. In other words, a similar problem to what OP is complaining about, one hop away.

You're doing nobody any favors by elevating technical details out of their narrow context and stating them as an unassailable description of high level behavior.