I would have agreed 5 years ago, but not this day and age, when AI is raping open source projects and killing platforms like Stack Overflow.
We need a safe space from web crawlers and surveillance, and open forums ain't it. (Neither is Discord, but a sufficiently secure alternative might be.)
Do you really think Discord is not scrapping all the traffic that goes through its service for either their own purposes or to sell data for profit.
And if its not doing it now, it will certainly happen once/if it goes bust.