I understand your analogy, but what I am telling you is that the stoplight is red and yet SL is able to get through the light. I'm not trying to be rude, but I have an M.S. in Instructional Design & Educational Technology and I'm trying to explain that what Rod has described and what you have described is not the correct solution to this problem. I know that you are both volunteers for the community, but your answers are incorrect, based on my experience.
When I get off work today I can make a video demonstrating both, or you can just take my word for it. Either way, this thread is not going anywhere. The problem is with Adobe's output--but I am sure this not something that Adobe wants to hear.
Just as the last point, I am also an Adobe Campus Leader, so I'm not some casual user. If the issue is affecting me in this way I would say it should be a giant red flag for Adobe. Anyway, I have to get back to the job that actually pays me.
Derek
The recent change that was made by the update to Captivate 2017 was designed to get e-learning developers to start preparing NOW for what is going to be forced on them again in October when Chrome version 70 hits town and again turns off support for auto-playing without user intervention. Although Windows browsers might in some cases still be allowing auto-play the fact is that they will also shortly be following suit. It's just a matter of time.
I get the fact that there are a lot of Captivate developers right now that might not be agreeing with Adobe or Google Chrome's decision in this area. I can see both sides of the issue, but the fact is that we (on this forum) have no control over what Adobe decides is the best course of action for their application. It's not negotiable.
Adobe has quite clearly explained the reasons for their decision here:
Captivate responsive courses will not auto-play on browsers
I am assuming that in comparing results between Storyline and Captivate 2017 you have tried setting AutoPlay to ON again as shown in the web page link shown above and then republishing to test? Or have you left AutoPlay set to OFF as is now the default?