I am not totally against the idea of preemptive action, but the circumstances under which its used should be much more narrow and ethically based than the circumstances that the current US administration has used it under.
As it happens, Myr, I am in agreement with you.
The invasion of Iraq for instance; I cannot see how that would fall under any narrow or ethical justification, for preemptive action of the kind that was used.
I think that is a moot point as there were existing and legitmate reasons to act against Iraq completely divorced from any need to invoke a doctrine of pre-emption. I have argued previously that existing UNSCR resolutions provided all the legal justification necessary to resume the 1st Gulf War after Irq refused to abide by the terms of the cease fire that temporarily suspended combat actions in that war.
As for the US doing what it wants because it has interests, well in in psychology, people who constantly act violently in their own interests with out consideration for the rights and feelings of others, or without any residue of moral unease, are called psychopaths.
Well, nations are not people and such considerations do not necessarily apply. I do however agree with your general point. The decision makers in the US ought to consider the consequences of their decisions and make decisions with that in mind. In short, they need to weigh competing interests and decide if a particular action has negative consequences that outweigh its potential positive results. The perception of the US in the rest of the world is one of those factors that need to be considered. In the military we call these concerns Information Operations and they are a continuing part of battlefield preparation and consequence management. They are a significant aspect of overall strategy and one that is ignored at a commander's peril.