first of all, that's 70 years ago. War are different back then we lost hundred thousand in a conventional war in those time, we lost 55,000 with the last prolonged conventional warfare.I think you are little overconfident. The PLA was at its weakest in the 1950s. China was weak, malnourished, civil war ridden country. The US was the premier industrial and military power with Nukes. In such an environment, the PLA spanked one of Americas’s greatest generals into retirement. Douglas McArthur couldn’t outfox nor outmaneuver the PLA. His only option was to ask for nukes, after which President Truman sent poor senile McArthur packing into retirement.
Second of all, you are talking about US attacking a country 13,000 mile away while Chinese move roughly 450 mile.
It's always knew that China would attack and the US will have the same problem the North Korean had if the they try to make it all the way to North in a Banzai/Bumrush Charge. That's why noone in the Truman administration support going all the way to the North. You need time to build up supply and support, that what we call "Phase line" Strategy
MacArthur is in over his head and that's why he was replaced. And PLA didn't "spank" the greatest general in that war or South Korea will not exist (Bear in mind PLA did cross the 38th and attack south, but was repelled) So no, I wouldn't say the same thing