There were a whole bunch of reasons. Some of them included that some characters fluctuate between being "good and "bad," that Neutral/Good/Bad was too ambiguous, and how can we be sure if a character is Good/Bad/Neutral (for example, somebody breaking the law for a greater good, or somebody doing something bad thinking it was good, or a villain redeemed, etc.)
Hey, I've noticed that you like to delete useless pages, I have one that is ready to go.
There were two pages for the same character, Dieter Skul (Earth-616), to which I added all relevant information and pictures, and General Skul (Earth-616) which is now useless. The character was originally introduced in the 80s simply as General Skul, but was finally given a full name in the Avengers 1959 Vol 1 series in 2011, which resulted in the two separate pages.