"Dumb" question about tubed vs tubeless tyres

[flyerblade]

Hi all,

This is probably a dumb question but here goes. I can understand that with tubed tyres you would want to carry something to help break the bead in order to repair punctures in the tube, but with tubeless tyres why would you need such a device ? (assuming you don't want to fit new tyres you might be carrying yourself by the roadside). Am I right in thinking that tubeless tyre repairs involve just plugging the hole and re-inflating, then replacing the tyre when you get to civilisation or am I missing some scenario where beadbreaking would be involved ?

Thanks,

Ian