You keep dodging the issue.
1. Should the US regime intervene in the sovereignty of other countries when our national security is not in jeopardy?
2. Based on similar recent interventions (Iraq, Libya, Syria), each of which created far worse hardships, death, and destruction with no recovery to date, what makes you think this time will be different?
I'm not dodging issues, just pushing back on what appear to be favorable characterizations of a petty tyrant running an awful regime, and the apparent ignoring or white-washing the utter train wreck he and his predecessor largely created.
As to your specific questions, these are legitimate and I'll address. Caveat, all I have to work with is publicly available information--I have no idea what is going on behind the scenes.
1. It should be a case-by-case calculus. No situation is the same, so I'd steer clear of any hard and fast doctrines. I would consider it pragmatically, not as a fundamentalist adherent to doctrinal theory. While national security is paramount, it is not just existing national security threats that should be considered, but likelihoods that a national security threat will develop. Having a hemisphere full of friendly regimes is much better than having a hemisphere full of hostile regimes. A hemisphere full of hostile regimes implicates national security--does that mean intervention every time? No, I would consider it on a case by case basis. In addition, national interest is much broader than just national security and should be factored in heavily as well. Severe humanitarian disasters also may come into play. Stopping a large scale ongoing genocide such as Rwanda may have made some sense, even though no national security threat existed. Hyperinflation and the resulting failure of society in our hemisphere may call for intervention (economically, diplomatically, covertly/CIA, or as a last resort militarily).
2. We don't necessarily need to commit large numbers of ground troops, or possibly any troops at all (we shall see). There's more than one way to skin a cat. The opposition who filled the power vacuum in Iraq, Libya, and who tried to fill it in Syria, consisted in large part of many radical Islamists who abhorred the US, basic human rights and freedoms, etc. Maduro's opposition consists mostly of pro-US (or at least neutral) persons, many with professional backgrounds--the sort of folks who used to run a (mostly) successful country before the likes of Chavez and Maduro seized power. These are the sort of folks under whose leadership Venezuela could get the existing wells back into production, get hyperinflation under check, and ultimately develop the Orinoco Basin with both domestic and foreign expertise. Obviously, there are no guarantees, and never say 'it can't get any worse', but right now it's pretty awful.
Those who want to take a strict isolationist stance, fine, that strain has been common throughout our history. But here, non-interventionists should say something like: 'The Chavez/Maduro regime is awful and has caused much harm to Venezuela including hyperinflation, hunger, assault on human rights and freedoms, etc., but the devil we know can be better than the devil we don't know, it doesn't (yet) directly impact our national security, and it's really none of our business, so let's sit on the sideline", and
not say something like: "The Chavez/Maduro regime is just fine, if it weren't for Yankee imperialists Venezuela would be flying high under Chavez/Maduro, it doesn't (yet) directly impact our national security, and it's really none of our business, so let's sit on the sideline"