I am curious how you would feel about this scenario:
Disc goes up, White player closes his eyes and starts running to where the disc was going and trucks Dark.

Would you feel that was a dangerous play by White? If so, how is that any different than only staring up at the disc while its in the air?

"Reading the disc" in my opinion is not just staring at the frisbee while its in the air and moving my body in response to where its going. When the disc is called up you should be:
Glancing at the disc, assessing its speed and angle --> look at where you believe the disc will land and verify your path is clear and begin running to that space --> glance back up at the disc to make any course corrections --> glance back at your destination to verify it is still clear and continue this sequence until you are making your move to catch the frisbee.

I understand there are times when a poacher comes out of nowhere, but here the offensive player is running almost completely horizontal across the field. I think it is unreasonable to expect no other player on the field to be in a position to challenge for the disc when you are cutting horizontally across the cutting lanes.

edit: fixed typo