Sorry for the late reply. I haven't had the time to use Steemit as often these days.
Yes, you can still enjoy games made by others. And many facets of game development can be quite fun, like the ones which you point out. Balancing a game and making enemies smarter is pretty much the artistic part of game development, rather than a cold, rational choice.
No, I don't work in the gaming industry. There isn't a real gaming industry in India yet, and the market is still open to business opportunities while the required skillsets aren't really available in the nation. However, I have developed a few games myself just for the fun of it. And while developing them has been fun, I've noticed that my friends have more fun playing them than I do. Not that they're uber fun to play anyway, but since I've practically made them, they're pretty much like those movies which you've seen more than fifty times to me. So yeah I can't really enjoy the games which I develop. Unless, of course, it is a team effort and I don't really know how the end result is going to turn out...
I guess that's probably another reason why developers and animators in big firms can enjoy their own games. They don't work on all of it, but rather their own parts.
Thank you for taking the time to reply! Happy Steeming!