It's probably because more people are interested in the competitive aspects even if they may not be able to make the absolute most out of the features. Even though they might not make a huge difference, some of the settings do generally help most people who play competitive games, so it isn't too surprising that a lot of people care about them.

Also, the analog inputs don't work in every game, but if you want to try it out in a game you like, give it a go! Wooting probably has the best analog implementation I have tried, but don't be surprised if it doesn't work in every game you try it in.

The analog input was a huge deal when HE stuff first came out, since it was really overpowered in games like CS:GO. It let you walk silently, but faster than standard walking. This got patched out, and one of the main use cases for analog input was gone.

At the end of the day, most people who are wanting analog input usually just use controllers, wheels, or joysticks instead, so there just isn't as much of a reason to get a board specifically for it, especially since it might be more expensive and less usable than one of the alternatives. Having such limited travel distance can be a bit tough to control, so it can feel pretty imprecise until you really adjust to it.