Druw isn't a HOF because his career tanked at an early age and even if his overall body of work is worthy voters will only remember the last few years.
How valuable defense is in right is only a perception you and a few others have come up with. Turning fly balls and liners into outs and limiting doubles to singles is just as valuable in right and left as it is in center.
Except how many opportunities does Heyward really have compared to the average CFer or SS?