Because 1) chow wasn't cut by the titans until Jan 15, which came as a surprise to alot of the sports media considering the titans tendency to keep their coaching staff intact as much as they can. We hired clawson on Jan 11, and noone had any idea that chow was going to be cut at that point....save maybe the titans front office
and 2) chow was originally looking for a head coaching job in the college ranks before settling as UCLA's Offensive coordinator after he realized a good team would not take him as HC...we weren't going to try to sign someone as an OC who didnt want to be an OC, and neither were we going to fire the current coach b/c after a 10 win season it would look bad for the program and we weren't going to pay the huge buyout that would follow as well. Nor were we going to make a guy into a head coach who had zero experience as a head coach at this point
Point 1 was really more of the reason than point2. Had the timing worked out, well then maybe it would have worked. But we were already set and done by the time he was on the market