If you think his biggest strength was his distance off the tee vs other golfers than you don’t know golf.
distance isn't just about "off the tee", and distance matters.
it's also about being able to get out of trouble, hit it over a tree, clear water, etc, when others have to play it safer.
it's about hitting a 9 iron when others are hitting a 7.
about hitting an iron when others are hitting a wood.
Jack, Tiger, and Norman, are the three guys of my time that were basically playing a different course than everyone else, and all were dominant in their time.
yes, it takes a lot more than distance, but the dominant guys of the modern era have been the ones with the great short games and dominant distance.
i don't see anyone with "dominant" distance today, though many hit it a ton..
not that they don't kill it, just that they're playing a bunch of other guys who also kill it.
it will be interesting to see if another player with a great short and overall game comes along, who along with Jack and Tiger, is basically playing a different course than everyone else, due to a dominant power game.
as for Tiger today, a minor tweak can change missing every fairway to hitting most of them. (no tweak can take you from hitting it 240 to 310).
loss of range of motion, (flexibility), is why his swing isn't as fluid as it was. (still crazy flexible compared to normal people, but not nearly so as young Tiger was.
the guys with the most fluid looking swings, are the most flexible ones.
age takes away range of motion, as does bulking up. (don't bulk up if you're a golfer).
if his back holds up, he can compete again. but he'll never dominate again, because he no longer has dominant distance to go along with everything else.