Being “unenforceable” doesn’t stop them making your life a misery in the process, ruining your credit rating etc.

As an EUian,I've never given one care about my credit rating. I don't even know if I have one.

They can cause a long drawn out court battle, and abuse your data. Noyb is the real-world example here. Most companies depend on not being sued, and will fold if a regulater sends them notice.