I can’t speak for everyone, but I doubt most people are anti weight reduction. I think it is more of a practicality issue.Generally speaking, reducing the weight of a vehicle will improve all aspects of its dynamics (acceleration, braking, turning, mileage, wear and tear on bearings etc). It's weird that folks here seem to be "anti" weight reduction just because we are talking about a big, heavy truck - that should mean there is lots of opportunity to cut weight. Sure, it's not a sports car but weight reduction is nothing but beneficial if done without sacrificing other attributes (strength, comfort etc).
Example parts that are typically added to make the truck more capable off road are heavier not lighter.
My 16” 3.5’s are much heavier than stock, deavers more heavier than stock, etc.
I doubt most want a heavy truck, it is just not overly easy to reduce the weight on a vehicle like this and keep the capability.
It depends on what the OP is actually after but part of driving a vehicle is the feeling of speed. Going 60 mph in my 2000 ranger feels really fast where as going 60 in the raptor doesn’t feel like anything. The difference is I am much higher from the road in the raptor, much more sidewall, suspension (both travel and damping), etc.
Also the more you dig into the truck the less it looks like a passenger vehicle and the more like a race vehicle. I am hood with that but I would say most aren’t. A set of say PRP alphas are probably a bit lighter than the power seats in the truck as is, but I bet a fair amount of people prefer stock.
Basically it is hard to not sacrifice those items you listed to lose some weight and the weight you lose may be minimal as far as a percentage goes.