Because most CD drives and floppies are now in the ugly Unity Beige held, which is even more attractive with increasing age.
But as a true modder or PC lover, you do not have to be thrown back by such trifles, because of course we can provide a remedy for this problem.
The Lian Li bezels are made of genuine aluminum and come in a variety of templates to cover most drives. If your CD drive is not among those mentioned, you should, however, be very sure before you order a different aperture, since they are usually adapted exactly to the specified drive.
The panels are very easy to install, because they are self-adhesive. But beware, because they are VERY sticky. Once attached, you can usually only remove the panels so that they are not usable a second time.