To just convey ideas? Of course it's not necessary. To convince someone to change their world view? This is nowhere near _enough_, just a small start.

They were not talking about couching every fact or snippet taught in physics class getting couched in all this extra "sugarcoating". They were talking about the kind of conversations that almost never go well at all - they're trying to improve the odds of an interaction convincing someone to change their polarized viewpoint from 0.01% to 0.03%.

For that use-case, obviously there's value in exploring different techniques, given the typical technique (scream at them and then block them) doesn't work well at all at actually changing their mind.