Yeah, okay.
From Space.com (emphasis mine) - At its warmest, when it is closest to the sun, Pluto can reach temperatures of minus 369 degrees Fahrenheit (minus 223 degrees Celsius).
I was thinking the same thing.
Very little life on Earth can survive beyond -20C (and we're talking organisms here, not sentient life forms) and it's not even theorized that anything could exist at the temperatures on Pluto.
Keep in mind that it takes Pluto 248 YEARS to orbit, so those balmy temperatures you speak only come around for a few days four times a millennium.