You should only re-veg a plant when you want to keep that particular strain going. Yes, there is a huge risk of any plant turning hermie when you do that, but I do not suggest you do it with this plant. It is already budding and the risk for hermi plant is switched back is a great loss. Just let it finish and give your plant more time next year for when the light changes.

Is it worth it to fuck up that plant just because you want it taller? I think not, because once a plant starts producing seeds, THC production stops. THC stopping in your case would render the entire plant unsmokable, and you'll get very little from it if you did an extract to make it smokable.