If the EU was starting to go rogue like US is, it could easily bully Switzerland to force their hand into giving whatever data they want to, given that Switzerl

If the EU was starting to go rogue like US is, it could easily bully Switzerland to force their hand into giving whatever data they want to, given that Switzerland have no frontier with sea or non EU country (not that I can imagine this scenario happening, but Switzerland is a weird choice to hide from EU)