He has a weird definition of "turned loose", but whatever.
I see a lot of contradictory criticisms with respect to Lance. On the one hand, he hasn't thrown a lot of passes prior to being drafted in the NFL, but he showed enough potential that the 49ers spent a lot of draft capital to trade up to take him at a mere 20 years old. This potential he still shows today in a multitude of plays. On the other hand, he's criticized for his play when he doesn't perform as well for this "green-ness" in situations where he's learning at the highest level (not with starters, but mostly backups and players who are fighting to make the team but aren't starter quality caliber) is often ignored. People say you can't improve accuracy, but that's typically only true if you have thrown it a lot and show no improvement, just like it is with any other skill. But that's not true in the beginning because all high school, college, and professional QBs start throwing the ball as kids at some point with some having immediate talent on display while others not so much and have to work harder at it, but all of them improve on it the more they do it. If a QB is a green then his accuracy can improve although it may not. The same applies to learning in any game type of situation.
Nowhere have the Cowboys organization ever stated that Lance was going to replace Dak this year. McCarthy said he was green, and even Jerry never implied anything like that, only that he would get a lot of snaps in preseason and try to compete with Rush for the backup job.
You can't have it both ways and judge with multiple standards.