On this we completely agree. We are at such a disadvantage knowing so little about the program and what concerns may have been expressed. I do know that Hoekstra has claimed that Harmon didn't express any and the administration I believe has claimed the same thing regarding the members who were briefed. Regardless, your point stands.
I do wonder what action the government planned and plans to take with knowledge gained from secret surveillance obtained without a secret warrant. Arrest? Criminal charges?...
I found this to be one of the more interesting questions raised in the hearing. Again, without more information about the program it's hard to consider completely, of course that "more information" is probably the real critical operational aspect (ie, the use of the knowledge in the field).
The problem IS keeping surveillance secret. We have TWO enemies....the terrorists and the Dem Operatives. It couldn't be clearer.