Go ask them since you seem to know them (I mean you are calling them silly). I prefer to deal with the evidence and that shows that LHO never boarded Mcwatters' bus.
Your fantasy theory is that Oswald was never on the bus. And that the conspirators contrived the bus and cab ride to cover up for someone giving Oswald a ride. Right? I simply asked you why - in your opinion given that you are advocating this theory - the conspirators would contrive
two fake scenarios when the cab ride alone would suffice for this purpose? If you can't even come up with any explanation to fake a bus ride given that that cab ride is sufficient to provide a cover story, that should tell you something about whether this is an intentionally contrived event. It's risky and completely unnecessary as part of any fake scenario.