That was already very unstable/dying, not a normal sun.
The one the people lived around must have been stable enough for their planet to support life and that one was supposed to be a close match.
Given it's obvious role, I don't have to be anyone of the kind.
Destroying a marquis base?.
If you wish your assignment of the term "super-weapon" to be worth a damn in regards to canoninity you will need to be one or the other or get one or the other to say so buddy.
Given what we know about M/AM reactions it's perfectly reasonable.
And yet simple m/am reactions do not fit with the effects we see from photon torpedoes so it is unreasonable.
And we never heard of anything like the Dreadnought going after any of those.
The dreadnought was sent after a marquis base but got grabbed by the caretaker and its circuits got scrambled and we have examples of marquis bases.
We know that the proximity to the Romulans would have limited the timeframe, but your interpretation again doesn't jive with Riker pointing out the ammunition problem, which if they were just going to fire a few salvos he wouldn't have even brought up.
Apart from the rather obvious fact that instead of facing the warbird with a full load of ready photons and phasers they would have only phasers until the photons were reloaded, so yea it jives perfectly and fits with the fact that phasers could have drilled to the ship in seconds (a fact most people looking to use pegasus to lowball trek ignore).
Then give us a clear example of greater firepower, you have yet to do so.
Skin of evil, TDIC, obsession, the immunity syndrome ect ect...
Yet we saw none of said destruction, it's only canon that they said it, not that it's true. Visuals Trump Dialog and in this case 30% of the crust was obviously not destroyed, not even close.
You cannot dispute canon dialog just because the removal of the planets surface was obscured, 30% of the crust was stated to be gone and no one was shocked at the result any dispute in visuals are easily explained by how phasers and other trek weapon effect matter.