I'm a game dev and imo web-devs are the 'seat-of-our-pants' guys. In games we tend to use compiled and statically typed languages. They're pretty strict in what they allow and many errors are picked up by the IDE and/or prevent your code from even compiling.

Whereas javascript.. Your code could be doing almost anything yet it will run just fine. Also, cus its not compiled the IDE for javascript is much much less helpful (eg. theres no "find all references") and much more permissive.