presenting certainties lends itself to endless discussions.
Unless one desires to have deeper discussions that posit things as a given. If one is never certain about anything, one can never have progressively deeper, meaningful discussions about what they and their following certainties mean. Otherwise it’s just a house of cards that will fall once the foundation is touched.
See also, the parable of the wise and foolish builders:
The wise man built his house upon the rock. The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. The foolish man built his house on sand. The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash.