The observation that scientists disagree on matters that they cannot resolve with science doesn't detract from the argument that the process of science is useful for building consensuses.

Agreed. It's not that scientists universally distrust human rationality, while philosophers universally trust it. Both groups regularly subject their own reasoning faculties to tests and to distrust. (And both also need to rely at least somewhat on human reasoning, since one can only fairly conclude that a kind of reasoning is flawed by reasoning one's way toward that conclusion. Even purely 'empirical' or 'factual' questions require some amount of interpretive work.)

The reason philosophers seem to disagree more than scientists is very simple, and it's the same reason physicists trying to expand the Standard Model disagree more than physicists working within the Standard Model: Because there's a lack of intersubjectively accessible data. Without such data for calibration, different theoretical physicists' inferences, intuitions, and pattern-matching faculties in general will get relatively diverse results, even if their methodologies are quite commendable.