I don't really read through 2014!5e or 2024!5e optimisation discussions, save on a very casual basis, so I can't really speak to the added value that collegial disagreement or adversarial discourse might provide there.
In discussions outside of char-op, I think it is valuable to have a diversity of views, although I agree with
@overgeeked that a lot of conversations here end up as argumentative nerds trying to get in the last word against each other and allowing themselves to get bogged down in quagmires of what comes across as mutual attempts at
fisking. Even when I'm broadly in agreement with one poster over another, it's tiring to read. (The thread about Mearls critiquing legendary resistance would be a good example, methinks.)