You have met very few to all appearances and are indulging in grand generalizations.
I’ve debated with libertarians on FR for years.
I know a few in real life too. I’d say utter selfishness is a common trait, and the inability to see what their utopian philosophy would be like in practice. Grand generalizations is certainly a grand generalization.
“Let it be remembered that civil liberty consists, not in a right to every man to do just what he pleases, but it consists in an equal right to all citizens to have, enjoy, and do, in peace, security and without molestation, whatever the equal and constitutional laws of the country admit to be consistent with the public good.”
John Jay