Awards are often a couple of years behind reality especially for all time greats
A generalization of no pertinence here.
Jabbar's first 2 seasons (1979-80 and 1980-81) of his second decade in the league he received 57 votes from NBA head coaches for the all-defensive team. The only other Cs to receive votes were George Johnson with 8 and Dave Cowens with 7 (Caldwell Jones made one team but as a PF). So NBA coaches made it
emphatically clear who they thought the best defensive C in the league was those two seasons.
see fellow Laker Kobe Bryant and his All-D awards
The 12 seasons Bryant made an all-defensive team (all years 1999-00 to 2011-12 except 2004-05) the Lakers were the 4th best defensive team in the league at 102.9 pts/100poss allowed. Only San Antonio, Boston, and Miami were better defensively (27 teams were worse). Kobe alone played 1/7 to 1/6 of that Lakers team's total minutes played (34,633 min). No other Lakers player played even 20,000 minutes over that time. If Bryant wasn't a very good to excellent defender over all that time, just who was playing excellent defense on the Lakers such that they were the 4th best defensive team over those 12 seasons?
I can't say without doing some deep study
Let us know what you come up with.
plus it put him gradually into a more passive mindset
His first 10 seasons in the NBA Gilmore was 3rd among all Cs in minutes played, 1st in defensive rebounds, 3rd in offensive rebounds, 4th in blocks, 4th in points scored, 1st in highest 2pt FG%, 2nd in FTM, 2nd in FTA. Over that entire decade he averaged 35 min/g, 19.0 pts/g, a 60% 2pt FG% (10% higher than the league average C), 11.1 reb/g, 2.1 bs/g. Played all 82 games in 6 of those seasons, an average of 76 games/season over the decade.
Not exactly what you would call passive play.