Let us be clear...
EASA Airbus knows closely what a very high AoA A330 behaves like, did and does... assertions that a decent simulation of beyond the stall behaviour, couldn't be made... Pah!
Wouldn't but not couldn't... lateral and directional might have had to be a bit of a fudge, but plenty of high AoA data exists even there. CFD tunnels as well as work in many different (real) tunnels exists and a pretty reasonable model could have been built well beyond the stall, very accurate longitudinally including simulated buffet and no doubt predicted nodding or other type specific behaviour.
No, there are plenty of other reasons for not doing that... one being that the aircraft simply 'could not be put in that situation'
Another? Airlines wouldn't be interested in it...(read, pay for the extended sim or the time in it)