No, you just can't accept there were no other offers on the horizen. More quickly than necessary is just your opinion based on whatever you thought Cassel was worth. And that analysis was based on media spin and common sense, only one was wrong and the other isn't always in play in the NFL.
I trust Bill did his due diligence and found that the teams who would be giving up a first for a QB were not interested in Cassel at that price because he told us he did. Waiting around for some one of them to come to his senses wasn't an option, especially considering that getting a deal done with most potential suitors was also going to require a long term deal for Cassel. The only team left standing from the list of potential suitors pre draft who didn't move on the position is Minnesota, and they are playing coy with your binky now which was likely their plan since last July anyway... Detroit and Tampa didn't want Cassel unless he netted them Cutler, and that wasn't going to happen until Cutler alienated Denver's owner which didn't happen for weeks. Absent that they preferred to go with draftees, and they did. He was never going to be traded to the NYJ who also drafted their guy. Chicago landed Cutler because they had a functional QB to trade in addition to picks. Who else was there to trade a guy with a $14.6M cap hit to??? It made no sense to wait a couple of weeks to find out the answer was no one when at best the gain would have been a couple of hundred points on a draft chart and at worst it might have meant losing ground or being saddled with the player until draft day when all the targeted FA were long gone.
KC had the cap space to do the deal and the need for veteran leadership on defense to allow them to fold cutting Vrabel into the deal. And it allowed the team to move on and enter the draft without multiple glaring needs to fill since they did much of that via FA in the weeks immediately following FA. And that allowed them to persue value in the draft including adding multiple 2nds for 2010.
The sweet spot in this draft was from the mid 20's to the mid 40's. So from a value standpoint it made no sense for Bill to risk FA holding out for a low 1st vs. a high 2nd. Had it been there at the outset he probably would have taken it and parlayed it into yet another 2010 pick, but since it wasn't he didn't allow himself to stubbornly persue a hard line that in hindsight was not going to yield commensurate reward.