I prefer to see it as regular signals designate the next segment as a segment where trains are allowed to wait. If you don't want trains to stop in that segment

I prefer to see it as regular signals designate the next segment as a segment where trains are allowed to wait. If you don't want trains to stop in that segment, don't put a regular signal in front of it. And of course you don't want trains stopping on intersections, because they'll block everybody, so you always put chain signals in front of intersections.