The cold is also a thing, your wet clothes freezing on the line doesn’t do much, it also get super humid when it gets hot so your clothes will still be damp a you really don’t want to fold up damp clothes that have been sitting outside and put them in a drawer
Even if the clothes freeze they will still dry when the sun hits them in general. People still use them in very cold climates.
Okay, I’ll just leave them out for a week until the sun hopefully emerges for an hour.
If there is no sun, you can smack them with something so that the ice falls off. That’s the trick, if it freezes it’s actually good, because the ice will either evaporate, or if for some reason it doesn’t you can smack your clothes with something so that it falls off.
If they are damp then I guess you have to iron them…