The complex noun clause does not have to be interpreted as a plural. It can be: Rick wants to say that the first part of the sentence, which mentions three things, must be equivalent for determination of number to “these things”, and so the whole sentence is equivalent to “These things come with, etc.”

Now, that’s already goofy. What the writer of the sentence wanted to say is that “these things come with the territory” (which is a cliché). In fact the sentence is backwards: the truth is that high expectations come with the territory WHEN YOU ARE the point guard, etc.

That was the actual thought. It’s amazing how many perfectly good thoughts get garbled like that.

But to return to the first point: suppose you interpret that three-term noun clause (“being the point guard, etc….”) as a singular? This is what Rick thinks is impossible. Of course, we just showed conclusively that the whole sentence was mis-written, so we get a free shot here.

But that shot is an easy one. If the noun clause was a plural, it would be (logically) equivalent to “these things”. But if it’s a singular, it can still be held logically equivalent to “All this”:

Being the point guard, leader of the offense and the No. 1 recruit – all this comes with…

And the only way to decide between them is that if you read them out loud, the singular actually sounds less odd. But my re-writing of the sentence – “High expectations come with the territory when you are the point guard, etc. ” is what the author meant to say, before dyslexia or whatever intervened.

Being the point guard, the leader of the offense and the No. 1 recruit in the country comes with high expectations and praise from many different sources.

Correct:

Being the point guard, the leader of the offense and the No. 1 recruit in the country COME with high expectations and praise from many different sources.