You are comparing generational talents with vastly different skill sets and strengths.
It is like comparing Crosby and Ovechkin. Yes, Ovechkin was the greater goal scorer. If that is all that you look at Ovechkin has the edge. Although Crosby proved that if he wanted to focus on one element he could do so and become the best. He did it with goal scoring one year. Face-Offs another. And on and on. I doubt Ovechkin, or McDavid had the ability, or work ethic and driving desire, to do similar.
Finally, McDavid does amazing things when he has the puck. But you forget what Crosby could, and did, do on a nightly basis.
I think that there is a bit of this going on:
Recency bias
From Wikipedia, the free encyclopedia
For the serial-position effect, see
Recency effect. For the linguistic phenomenon, see
Recency illusion.
Compare
recentism, which overlaps.
Recency bias is a
cognitive bias that favors recent events over historic ones; a
memory bias. Recency bias gives "greater importance to the most recent event",
[1] such as the final lawyer's closing argument a jury hears before being dismissed to deliberate.
en.wikipedia.org