Meanwhile it's sort of becoming very clear that Venezuela is about Cuba.
Oil is also not the only security dimension, the other dimension is to deny China a physical staging ground near to US territory for air, missiles or radar and SIGINT. Not a problem right now, but again these calculations need to involve the temporal dimension. If you believe there's a 25% chance of conflict over Taiwan, using the status quo of peace to justify decision-making is an "assume the best" doctrine which is a terrible security doctrine.
This isn't to say that security calculations are the only factor involved in this Venezuela operation. It is one piece of it. It's also somewhat besides the point because I am discussing underlying causal mechanisms, not fixating on a specific conflict.
As for how this relates to those mechanisms: the only reason these "security calculations" are even considered is because the US no longer holds a monopoly on world power. In the 1990s, it was a foregone conclusion. In that security, "cooperation" could occur. Then liberals osberve that cooperation and mistake it as the cause, when it's really the effect.
Of course we do have competition, but where it has worked the best, it has been done in the context of cooperation, economic trade that follows norms and laws.
Too bad we gave stupid people power.