Well, certain posters will argue anything, it doesn't mean they're right.
it's entirely possible the talent deficiencies were sufficient enough that it actually took several off seasons to address them. Jason tackled the OTs, then the CBs, and then the WR group and interior OL pretty much in that order, leaving the DL to the coming offseason. That's still pretty much the order I'd have addressed things in. We just ended up with snake-eyes on the DL this year with Ware turning into a pumpkin the same season we lost Spencer, and multiple key role players. That's tough to overcome.
But we've got a guy with a plan and who works well with the owner and who's got a track record of bringing in young players and working within a very tight salary cap. I'd wager you'd have a hard time making a convincing argument that a candidate Jerry trusts enough to make the talent decisions on his own actually exists, much less that Jerry can find him and work effectively with him. I'd say the chances are a lot higher we'd end up with a worse situation than we've got right now.
As to the improbability of losses, I'm not sure how we'd measure improbability in this case, but I'd put that road playoff loss to SEA at the top of almost any list. The Terry Glenn fumble late in our own end zone, the Witten first down that was reversed. The slick football on the hold. All against a team that was fielding street free agents at starting CB positions. That's about as freak as they come. When your HoF HC says the team is dumb and he doesn't know why (or whatever his quote was), that's really saying something. And, not to be a broken record, but almost none of these heartbreaking losses happen if we can play even middling pass defense. It seems heartbreaking because we take the leads, and then we just can't hold them. It's not rocket science to say that if you fix the pass defense you fix the heartbreak problem. If you replace the coaching staff and bring in a new offense and defensive scheme, you still have the pass defense problem, and you've introduced a whole mess of uncertainty on top of that. I'm not sure that's necessarily an improvement.