I have only a couple of very big, very bright lights. They're used mainly when I hear a racket outside my house late at night, and I want a LOT of light to investigate. I have a big, four-emitter Blackshadow Terminator that fills that role very nicely, and also an Olight 18650 thrower for lighting up things a bit farther away.
My high-lumen pocket lights are used in my work. I am an audio engineer so I do a lot of work in dark theatres, concert venues, auditoriums, and even outdoors. When I need to see what's going on with something, I need a lot of light, right where I want it, RIGHT NOW. I also have a number of lights that have red emitters built in (Nitecore Chameleon CR6, for example) so I can throw a nice powerful beam that won't screw up my night vision.
I got interested in high quality flashlights because everything I found on the consumer side of things was flimsy, unreliable, delicate, and frankly kind of dumb-looking. So experiencing what a flashlight really could be in terms of practicality, intensity, reliability, and quality turned me into an enthusiast really quickly. I probably have about 18 lights in my collection right now that I rotate around or select for particular outings.
I've just ordered a 2000-lumen headlight (an Olight H2R) to replace my older, low-intensity headlight. It should show up in today's mail. Looking forward to that -- that's one serious high-beam.
Scott