I recently placed some PDF files for some nontechnical people on Dropbox. To avoid confusing them with the long complicated Dropbox URL, I even created a shortened link for them to use (think https://event.myorg.test).
Almost none of them had Dropbox accounts.
I found out later from someone that 90% of them couldn’t access the files. The link didn’t require a login but they made it look to the unsophisticated observer that you need an account to get the files. So these folks (most of them were elderly), just gave up.
The dark pattern nags to unregistered users for shared files are the number one reason I permanently abandoned Dropbox for personal and business use. It was subtle at first, then it got pathetically bad.
When a company like Dropbox prioritizes user account growth over usability, that company debases itself and deserves to lose.
But you don't need a Dropbox account to view any file for which you created a shareable link.
If you add raw=1 to the URL then it will directly show in the browser without the Dropbox viewer.
Or did you share a folder?