I think there's an assumption that anyone who learns BJJ will be able to defend themselves on the ground and that's not always the case. I know people like their BJJ and MMA, but don't make the same mistake many Kung Fu students make. Just because you take it doesn't mean you'll be good at using it in a real fight. Nor does it means that you'll have enough skill in BJJ to beat someone who may be stronger or faster.I think this is a sensible enough approach. Getting a ground game is a long slow process over the age of about 40 for most people. Since you already have ability standing why not focus your efforts on remaining there or getting back there if you are not there? VT itself takes a lot of training to remain usable.
If I have 5 years of striking experience and 1 year of BJJ experience. I will most likely try to win the fighting with my striking because it's my strength in comparison to my BJJ. If I try to win the fight on the ground with 1 year of BJJ then I could seriously be asking for trouble by not fighting in my area of strength. In this scenario I could see myself using BJJ as you stated by trying to recover from being on the ground so I can quickly get up and use my striking experience.