If our IUOC was conscious on its own, then there would be no need for the messages that create its VR experiences. What it would then need is something like Star Trek's HoloDeck where it could wander around. But our IUOC has no eyes, ears, taste, can't eat and so on so that option wouldn't work. What we understand there to be is the messaging created by TBC that supplies our experience of what ever VR we are participating in. There is no need for a VR experience mixed up in our participation in the Union of IUOCs that is AUM. AUM depends upon our IUOCs doing their jobs without some kind of bias, not taking an attitude perhaps and saying "I'm not going to process that kind of data for AUM" or skewing a result because of some kind of bias. Our IUOCs therefore don't even know, not being conscious in themselves, of what they are doing for AUM as part of AUM. So I can't figure out any way for our IUOCs to create their own experience without these messages coming in, created elsewhere and by other IUOCs as TBC to provide what they are conscious of. It might actually be some other way than this, but at least it is logically consistent, makes sense this way.
Beings in NPMR don't have eyes, ears, noses, etc either... and technically speaking neither do we, we just have the data that translates to those things in order to keep this PMR reality consistent with the ruleset. So I don't see how that point really holds up.
As far as your second point, by that same logic, AUM could overturn FWAU's from working against it... perhaps AUM is, as I said, an instinct, and perhaps that instinct (naturally) courses through the IUOC's as well, since, afterall, they are in fact individuated pieces of the AUM, so if the AUM has this instinct, then does it not follow that they would have this instinct as well? It's logically consistent with my original hypothesis.
AND, furthermore, could we not make the same argument about FWAU's choosing to go down the right path, and increase the entropy of AUM? And yet, FWAU's exist (here we are). Which means either AUM is OK with them, and has a choice, or they're just naturally emergent from this primordial "thing" which we call AUM. SO IUOC's could CHOOSE to overcome this instinct and not bother to lower their entropy, but why would they? And the vast majority would naturally follow their instinct and move forward. Naturally, following this instinct is the more pleasurable/joyous path...
An analogy would be sexual expression. Some people choose to be completely celibate, but since we have an instinct to have sex (biologically evolve, which is another expression of evolution) very few people with plenty of access to sexual partners will decline sex entirely.