I know what you mean.
I guess it mixes together a few things -
you had very limited smoke so you probably saved it for desperate circumstances, if you hadn't been shot at yet maybe not that desperate?
Also would it attract more attention than just trying to get away?
Also the level the rules are aimed at probably affects the rationale - I know you can play one model = one vehicle, but it always feels one level up to me, and that makes me rationalise things slightly differently. I'm not thinking of a single vehicle most of the time.
I guess in the end if you were playing one model = one vehicle and you wanted to give the commander the option, you could house rule it as an opportunity reaction for any trigger, and say only allow its use once in a game, to reflect the limited amount available. It would involve record keeping, which loses a significant attraction for me, but if that was all you were recording it isn't much of a problem. Depends whether you can persuade the people you play against I suppose.
As for what Pete intended when he wrote it - only he can tell you.
Cheers
Guy