For 100 years people got to their destinations using compasses and/or paper maps. I reckon I could get where I'm going just as well using those tools, but utilizing modern technology sure makes a lot of things a lot easier and faster.
For me, red dots and lasers help with shooting from unconventional angles and with nonstandard shooting stances. It helps because my eyesight is terrible, and I can't see my sights at all (they're blurred out) when my arms are extended. It helps me get on target faster. It helps with shooting in low light while being focused on the target. It aids in seeing exactly what's going on and might need to be corrected when practicing and training at the range.
Neither laser grips nor red dot optics add much weight or bulk in my experience. The laser grips are basically the same footprint and weight as regular grips. Red dot optics typically only add an ounce or less to a gun, which isn't noticeable. "Adding 10 lb" is a bit of a stretch.
It seems more like people who have always done things one way are typically stuck in their ways and scoff at new techniques. That happens every generation from parenting, fashion, cars, types of firearms, and even firearm accessories. I'm sure that the modern "mall ninjas" will be turning up their noses at new devices and techniques that they never "needed" back in their day when they get older.