There is literally a 6 page thread on how a 6000hr FO smashed a perfectly good 767 into the ground in the USA. I'm not yet aware of any 200hr FO in Europe doing the same?
There are inexperienced safe pilots and experienced unsafe pilots. Any law suggesting otherwise is knee jerking as a response to tragedy or quite simply trying to make the job more inaccessible as a means to improve terms and conditions by reducing supply. The latter not being such a bad thing I must admit.