hmmm... something a bit "off" here...
I don't operate B737 or anything similar, but I have in the past worked at a location where the only runway available for 737 ops was a 6000 foot runway. Those 737's have operated to/from that runway for in excess of 40 years without incident -other than a couple of very memorable bird-strikes on t/o, one of which I witnessed from the hold-point -impressive!
More to this than meets the eye.