I struggle with the theory of an opportunistic neighbor deciding to abduct Jason, particularly someone he was not on close terms with. Apparently, Jason liked to take long walks in the evening. If anyone was planning to kidnap him, that would be the time to do it. Not when he's leaving his house in broad daylight. Jason was not easy prey for a random predator. Abductions of that nature tend to involve victims who are smaller, isolated, or vulnerable. It feels statistically and practically unlikely for a spur of the moment abduction.
For me, when putting together a working hypothesis, I look at what was different that day. What was out of the ordinary? Jason never disappeared during his normal routine. He only disappeared after his plans got changed and he was called into work early. Now, maybe that was just a coincidence, but it's the one variable that changes everything. Then I look at Jason asking to be picked up at Benson High School. That's often explained as Jason being poor at giving directions, which is a possibility, but choosing a pickup spot also gives him the freedom to make a detour if needed, especially after his schedule unexpectedly changed. Obviously, I don’t know why Jason would be meeting someone, but a lack of motive doesn’t mean the theory should be dismissed.