JS was never really obfuscated - it wasn't the goal of minification. Minifiers especially struggle with ES6 classes/etc, outputting code that is almost human readable.

Proper obfuscation libraries exist, typically at the cost of a pretty notable amount of performance that I'd wager most are not willing to sacrifice

And like even the best of client-side DRM, everything can be reverse engineered. All the code has been downloaded to the user's machine. It's one of the (IMO terrible) excuses for the SaaSification of all software