This article has a great point, though it definitely also depends on the field in question. The best web developers/software engineers may or may not be visible

This article has a great point, though it definitely also depends on the field in question. The best web developers/software engineers may or may not be visible online, since they could be working on internal stuff at companies with NDAs, or dislike marketing, or whateber else. But the top experts for a lot of 'internet first' fields will likely overlap heavily with those who are loudest about them online. The world's foremost experts in say, blogging, SEO or content marketing will probably be extremely active online, since their expertise is in large part about marketing themselves and their work. The best speedrunners, game modders and others in such communities will probably have a visible online presence, since the community only exists on the internet and someone who does well at one of these things has a decent chance of getting a YouTube/Twitch career out of it. And on the contrary, I suspect a lot of fields with an older demographic will probably be more representative of the situation in this article, where many of the people who are best at them aren't used to the internet or social media, and stick to doing their work/hobby offline instead. So it's very much based on the field. The world's best carpenter or sprinter might not be on Reddit or Twitter that much if at all, whereas the world's best Super Mario 64 player is probably going to have quite the internet presence.