I disagree, military action will result in very large loss of life this has to be the very last resort. Both sides need to back off and allow North and South Korea to get into talks.
The problem is that even if the US backs off, a missile with nuclear warheads will still be heading their way.
The only option really is to disarm NK. There has been lots of time for talks, its proved fruitless and has just allowed NK to grow their nuclear program in the meantime.
That's actually not an option - if you mean disarm by force.
China has made it extremely clear that it will defend DPRK against any preemptive strike by the USA. Their concession is that if DPRK was to strike US (including Guam) then it would remain neutral (allow the US to retaliate).
If the US did launch a preemptive strike, there would almost certainly be a bloodbath - which could escalate to global disaster.
You could say that talk has proved "fruitless" - but actually, apart from isolated incidents - perhaps not. Despite no peace treaty, an armistice has held since the cessation of hostilities more than 1/2 a century ago.
I'd ignore Trump's cowboy bluster - as officials in his own administration seem to be doing.