I take your point that, taken as a whole, OASC is geared to military flying. But elements of it are geared just towards flying training...full stop. And aptitude is aptitude. You may skew the measurement for different purposes, but only between narrow limits.
If I understand his post correctly, OP was awarded a Flying Scholarship. He doesn't say if he completed it or has done any flying since, but clearly aptitude was displayed.
The airlines have many pilots who failed OASC, some very successful in airline training and checking roles. They would say the Biggin Hill experience simply gave them the determination to prove the Selection Officers wrong. And as we know, focus and determination are useful, even essential, assets in a successful flying career.
OP should consider your points well, but not be put off by them, if he finds the military door is now closed but the CPL option open.