Everything you cited is irrelevant and none of it is in the rule book. The "non-emotional" reason for a runner to veer to his left, slide and make contact is simple - to break up a double play. It has been part of the game since the 1800's and when MLB modified the slide rule a few years ago they did not modify it to the extent that a runner who has been forced out is not allowed to slide provided he remains in the base line.
That is not allowed anymore dummy. Read the rule. It’s been cited several times in this thread. Or better yet just shut up.