Social media has never amplified the opinions of experts in the field and suppressed the posts of idiots. It's always been about engagement and it's the outrageous, extremist crap that generates the most engagement. Since social media companies are funded by advertisers, and more engagement means more ads to sell, social media companies seek to amplify outrageous crap. Furthermore, experts in the field will readily admit that we don't know something with 100% certainty while people posting outrageous crap will
talk like they know everything. This, by the way, includes people like Elon, when they're commenting on things like the war in Ukraine.