Because his testimony will perjure himself. Gowdy wanted Stroke to freewheel, the more the better.
The legals are burning the midnight oil comparing Stroke's statements to his previous testimony, Comey's testimony, McCabe's testimony, the evidence at hand, the evidence that no one know about - yet, and what Stroke's testimony should provoke as far as calling new witnesses or re-calling old witnesses.
This wasn't a one-and-done. Page WILL TESTIFY. And Stroke knows that. He knows the Deep State has used him and once they use you, they give you up.
Because his testimony will perjure himself. Gowdy wanted Stroke to freewheel, the more the better.
I believe Strzok committed perjury a number of times. The sharper members like Jordan and Meadows will produce the evidence of perjury. It will take a little time. Unfortunately they will have to refer it to the DOJ for action.