"If anything, the problems that occur during the creation of a motion picture stretch far beyond the bugs encountered when making a game."
I beg to differ. With a movie you are creating 1.5 hours of content (on average) seen from one angle. With a game you are creating 10 to 15 hours, or more, of content and depending on the game you are making, this content may be seen from many different angles. If an actor doesn't show up for work, you get another or you wait until they do (which wouldn't be too long after I can assure you). If an AI doesn't show up, you have to find the reason why it didn't.
Does the viewer ever get "stuck" so that they will not be able to complete watching the movie? No. If a movie has not been through too much testing and the movie fails half way through, will the viewer be thrown out of the cinema before the movie ends? No. With software both of these things can easily happen, with a bad physics routine, map design or just some obscure bug that crashes the game. What about compatibility (films you work on DVD and VHS versions)? Games have an infinitely larger list of things to take into consideration.
It can take a game in the testing phase as long as it does to shoot an entire film (not including pre-production and post of course). Games are just as hard if not more so to get out on time as the software industry shifts faster than any other.