Of course they are big catch rate has to do with a lot more than drops.
Dorsett mostly got deep low percentage targets in Indy. Here he got more short high percentage throws.
We consistently see that QBs complete something like 80% of short throws, 60% of intermediate and about 25% of deep throws.
To say catch rate is comparable without looking at those throws is ignorant. (Same with completion percentage but the larger sample size and the fact 1 qb makes all the throws and receives run different routes makes that less variable.)
A receiver getting 50 targets within 3 yards of the Los, 10 intermediate and 2 deep compared to a receiver that gets 15 short, 25 intermediate and 23 deep is comparing apples to oranges with catch rate.