I'll take the advice of guys like Dave Dunipace, Dave McCormack, Avery Jenkins, Jon Drummond, Timmy Gill, Lightning Lyle (a Twin Cities local with a similar amount of experience as yourself) among others over one guy's contradictory advice any day. That's where Blake got his information, he didn't make it up himself. Check out the videos here:
https://www.dgcoursereview.com/dgr/resources/throwanalysis.shtml
and think about how many of those people he got to talk to when making the videos.
Here's an article about distance throwing (which you claim OAT is not a part of) where he spoke with Avery Jenkins and Jon Drummond:
https://www.dgcoursereview.com/dgr/resources/articles/distancelines.shtml
I supppose they don't know what they're taking about, either?
That's one heck of a bibliography.
I'd suggest anyone reading these posts to believe whomever they want as well.
I understand we're both saying roll over and under can be used to shape a disc's flight, and whether or not it's OAT is largely irrelevant when it comes to actually playing, but it is incorrect to say OAT can not be controlled or used to shape flights. In fact, wrist extension can cause OAT that actually forces the nose down more. That's how guys (like Steve Brinster, IIRC) can use grips where the disc does not have a nose down orientaion, but they can get a nose down flight. I really don't understand what seems impossible about using a force to control how a disc flies.