In other words, develop your strengths. If you find yourself lacking in striking but being a demon on the ground, figure out to get the fight to the ground as soon as you can. If you suck on the ground but love stand up, find ways of keeping the fight standing up.
I think this is very sound advice. Lots of other fighters do the same thing - work their weaknesses up to a point that they can apply their strengths without hesitation. I am a 42 year old with a striking background. I know I will probably never get a black belt in BJJ, but if I can learn enough ground skills and take-down defense to take the fear out of the ground game, then that will make me better prepared to apply my stand-up.
It will get better with practice in any case.