@chris @porglezomp I have experienced this firsthand with multiple programs I've downloaded with a browser.
Right-click, open *should* do the same thing as double-clicking. That it no longer does, that even users with years of experience find this surprising, is exactly why it's a dark pattern.
@chris @porglezomp After removing the quarantine bit, the program launches and runs perfectly. It wasn't damaged, but Apple chose to write software which actively lies to its users. Worth pondering why they decided to do that.