jimmyg tough luck, is it? Fear of the unknown, moreover loss of the person's social position in the group once a large piece of self-perceived wisdom erodes into thin air.
FWIW the software spits results chosen to give the MAX PERF LIM TO weight. It is possible to model a case where forcing F2 will cause a higher V2 speed to obtain max possible gradient. While keeping F1 that perform better would allow for the chosen V2 to stay below the anabolic range.
Having flown long periods with 1+F, once in a blue moon then if you have F2 departure it feels as if the cargo doors were left open - during the acceleration segment.