Do you see how often people whine about colored parallels on here? That's not exclusive to this website.
The basic ones are not viewed as badly..and also they are consistent. You know that parallel is likely to be issued every year (although no guarantee). It's possible to build a collection of a player with a history. Some of the colored parallels come and go faster than even I can keep track of, and I'm one of the few who loves the colorful world we currently live in.
Also, most collectors view completing a rainbow as an impossible task. Even if you have the money, which most- including myself- do not, actually finding the cards for sale is very often impossible because of the 1/1s.
The basic parallel is viewed as a staple while the the colored parallels are viewed as a gimmick, as well.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
New Collection Website: Cardboard History Gallery (Still under construction)
Tips on how to make your scans look like the card does in hand (No more washed out, fuzzy scans!):