They always have been able to. It's called a blog, personal or company.
But everyone knows why "serious research" isn't mostly published on blogs:
Corporations like Elsevier have successfully executed takeovers of research centers (universities) and made journal submission a mandatory rite of passage for academics joining the state-mandated academia funnel. Don't publish? No postdoc for you. No professorship for you. No grant approval or news coverage.
Do publish in an academic journal? All the work you did, all the IP you invented, is assigned to the university and/or the grant funder. You're basically a non-shareholder: a contractor.
Researchers who do publish on their own tend to be viewed as cranks, since they generally don't use "journalese" and aren't required to cite from the same pool of "officially published" articles. Consequently, they also can't really get cited outside of the blogosphere - a blog post isn't "legitimate literature."
Researchers who don't publish in official journals and are labeled cranks generally can't afford to do research long term.
So how do you divorce yourself from academia?
Start a research company or project
Get funding via grants, product sales, donations
Use your research to directly build products and get a return on R&D invested
Decide to not publish your research in the open because doing so would take away the information asymmetry keeping you ahead of the competition
Oops, you are no longer publishing.