I'd warrant a tiny fraction of users have their own blogs now compared to a decade ago?
If you lived through Eternal September, you kind of knew this was coming.
But again, just because plenty of people consume, and plenty of companies cater mostly to the consumers, doesn't mean there isn't another world out there for those who look.
E.g. if you were to search "pug lovers" two decades ago, you might find blogs posts about pugs, people's personal sites filled with images and stories of their own pugs, a small community pug-loving, pug-adopting as its own forum.
Now the first page of Google for "pug lovers" shows: a Facebook page, an Amazon page, a Pinterest page, two Etsy pages, two bespoke (catering towards dogs) storefronts, and one cute site (http://pugdogclub.org.uk/gallery/pug-lovers/).
There's no objective better or worse - people want the things all the new top results provide - but I know which era of results I prefer.
Personally, I can't really say that I miss any of the sites designed like they were in the 90s, with their ever-rotating GIFs, Flash-based intro pages, "Designed for Netscape" badges.
And does an influencer need to have his/her own website? Not more than an ad needs its own website.
The "original Internet" is still there, and I dare say more people are using it than back in the 90s. It's just that a lot more people are also using the newer stuff that you don't like.
And that's fine.