Alas it's the Hockey Hall of Fame and not the Canadian Hockey Hall of Fame. Henderson was a good, but not amazing player outside of that goal. What he did was legendary, but only two countries cared about it (and one of them wasn't happy about it). In a similar vein, none of the 1980 US Olympic Team players are in the Hockey Hall of Fame, as only a few of them went on to have good NHL careers.
All that said, the '72 Summit Series is one of those things I wish I had been alive to see. But then of course I'd be over 20 years older now, so there's a trade off I suppose.