In theory, we can fly and even land on Pluto, but the main question is: at what cost? If we are talking about a passenger spacecraft, then, firstly, it will consume a lot of resources, food, water, air, and most importantly time. Secondly, to fly there one way for about 13 years, and back there is already 26 years, while it is possible to fit so much fuel, food, oxygen tanks and water into a spaceship, and water on spaceships is processed from waste, but even so, it not enough, and a very large supply is needed. There is also such a thing as the human factor, in 26 years anything can happen to a person, from psychological illnesses to some other illnesses, so now, this is not what humanity needs, because of the unjustified waste of resources.