I'm honestly not sure that's true.
Its not that hard to get a lot of reactions. Like, I have over 7k and I'm honestly not sure where those came from.
Secondly, and way more importantly, just because somebody got positive reactions doesn't mean they're credible. They could have been posting cute cat pics and got love emojis from that while spreading ignorance in other threads.
And even if they are credible on some topics, it doesn't mean they are on others, and most won't be on most topics. As such, then you might well end up with somebody talking rubbish about say some EU4 issue despite having a high reaction score, because they're very knowledgeable about CK3, and you'd not have any way of knowing how they got their reactions.
How so? And if its not mod posts, do they then need to necessarily be efficient?