It's not like Trump hid the fact that he wanted Venezuela's oil... public statements on the topic in 2023!
Part of the problem for Trump has been that none of the US Oil companies are interested in the risk involved in building infrastructure in Venezuela... to easy for an organised guerilla force to blow up flammable installations!
So for there to be any commercial interest, you first need stability... kidnapping Maduro just provides an opportunity for his VP to step up - the cabinet, government, military etc... are all still in place.
Not clear as to what kidnapping Maduro achieves - other than giving Trump another excuse to bloviate