From the perspective of a raid leader, the honest answer I have for you is simple. We don't want to waste a raid night wiping for otherwise preventable reasons. I can understand that mindset as someone who's cleared AS1-2 every week for a while now. As for fights that we haven't cleared, it's just generally preferable to have someone who understands how to perform on their role. If we wipe because the tank popped zero cds when they were needed, there's no point in bringing them into AS3, because they would never have gotten there normally.
My advice is pretty straightforward, find a static for Midas savage. You can clear these fights in pf, but if you're 5 months late, no one on your server is likely to care if you want to learn.