It is for people obscessed with going faster than anybody else.
Lol; there always somebody faster unless you are Brad Wiggins and he can be beaten in a sprint by Cavendish

Personally I just prefer to use strava as a way to track where I've been if that route involved segements and I get a top 10 out of a couple of hundred

but I've quickly realised that (except for the elite) alot of KOM's are gained by taking advantage of tail winds, dodgy cycling through traffic/ junctions or dodgy gps, contrived segments (that double on their selve etc) or in done in a Car

etc; and they are just not worth chasing IMO, I'd rather out pace (or be out paced) by a real person subject to the same conditions.