The fun problem with isolationism is it just allows problems to fester; then you have something much worse to deal with later. You may want to ignore the world, but the world won’t ignore you.
Edit: An Iranian proxy has been shooting civilian shipping and civilian crews from all countries for the last year. There are problems one cannot simply ignore.
I’m currently living in a country that was freed from British colonialism via war. I’m damn happy that war happened, I’m damn happy we have our own country.