The link you sent has the following language which indicates that others should not see my personal views. I believe that was the case until recently. There is a toggle that allows you to see or hide other people’s personal views but that Toggle appears not to do anything unless I am missing something?
“Personal views are also hidden from other collaborators’ view sidebars by default. This makes personal views the perfect tool to create tons of views to play around with visualizing a table’s data—without worrying about affecting other collaborators’ views or their view sidebar. Personal views are currently available for bases within workspaces on Pro and Enterprise plans.”