Charring isn’t flavor, it’s future cancer.
But seriously, like GunStar said, what would a serious chef benefit by giving you an overcooked steak? The worst you can say is that your beef is too juicy and the minute you put that on a review, you’ll get laughed at for being uncultured. Whereas if the chef entertained your ridiculous request, all she gets out of that is entertaining a fool who couldn’t begin to appreciate her quality work.
Personally, if you ever asked me to cook you a well done steak, I’d just open a bag of Obertos and plate it with sauce cup full of Tabasco. Then I’d charge you $30.