Peter King is no Brad Biggs to be sure.
If you were wondering what the Illinois basketball coaching staff was thinking would you be more likely to trust Jay Bilas or Jeremy Werner?
It seems like the real determination of 'credility' to you is whether they agree with you.
I'll agree, all of these dudes - Peter King, JT O Sullivan, Chase Daniel - these guys are more credible football voices than me. But I don't think it's a coincidence that you latch onto the voices who agree with you and argue their "credibility" over and over, while mocking people who post voices who don't agree with you (even when, in any other situation, you'd obviously argue that the team beat writer probably has a better idea what the team is thinking than a national guy like King).
Like you mock Brad Biggs but surely he's more credible than you, right?