As of today (December 12, 2020) there has been a change in how you can access downloads for Sitecore software. You no longer need the proper license or certification or even to login to download the software. You will still need a license to run the software, though.
From the announcement that I posted:
Sitecore has placed all downloads from dev.sitecore.net onto a global CDN to provide faster download times and availability to wherever you find yourself in the world!
This also comes with another welcome change that has been asked for by the community for a long time: no more account logins for downloads!
This aligns with the existing public availability of Sitecore NuGet packages and the new Sitecore Docker Image Repository.
Sitecore software is now available to download for everybody, anywhere in the world, no restrictions.