Screen readers almost entirely ignore the visual layer of any UI, and are entirely dependent on the layer that most developers ignore because it's not the visual layer. It's a perfect storm.
It stands to reason that someone who's actually used to using a screen reader should be brought in to verify what you've built actually works well for that target audience.
I'm a fully blind accessibility auditor, remediator and trainer myself, but I wouldn't dare to assume to know how a mobility-impaired user using eyegaze tech fares on a website I've audited.
My eyes don't gaze, so I don't have the context to make those calls.
On that note: I'm looking for work, anyone need me to tell them how their UI is bad for accessibility and fix it for them so they don't get sued later? :P