It isn't, the point is just that you need 1 dongle for this now, and you'll need 1 dongle for it with USB-C. This isn't making stuff better, but it isn't making stuff worse.

(Well, OK... it is making stuff worse, because you'll need to throw away all your old stuff and buy new stuff... oh, wait, you were thinking of keeping your old laptop? Well then, you'll need two sets of stuff! But the original point was solely about the cables and dongles.)