They may be presented as absolutely right, but that doesn't mean they are.
In Fight or Flight
, the Enterprise destroys an alien spacecraft, and they have no way knowing what the ramifications are.
The point of the series Enterprise, in my opinion, especially in the early episodes, is that, even if the characters think they are right, even if an episode preaches it as right, doesn't mean i is.
But also, another point in this thread supports the assertion that Starfleet shouldn't get involved at all in how a planet evolves, regardless of the morality. That's the point of the Prime Directive and one reason that it can make us all uncomfortable.