Almost everyone discourages settling, but many of us feel compelled to. Some of us expect very few relationships in our lives and need to try our best to lock something down because we might not get another chance, some of us find ourselves in relationships and legitimately don't think we can do better, some of us are plain impatient, there are many reasons. Everyone wants to be loved but nobody decides who loves them back.
I would say it depends on the definition of “settling” because some ppl have different ideas or misinterpret such as “marrying the first person you meet” versus “compromising, acknowledging as long as the partner checks off 7 or 8/10 criteria knowing that no one is absolutely perfect in every aspect.”