It's a realistic driving environment. Such an environment is kick-ass for racing, as we all know. Turns out not to be too bad if you like hanging your backside out on a corner or between some cones on a straight, AND it's also a nice place to go motoring and "simulating" driving in all respects.
Cruise server popularity (I'm sure I've said before) is testimony to the quality of the simulation. Not specifically the racing elements of the sim, but the car physics of it. Let the cruisers do their thing. Regardless of suggestions to the contrary, they're not hurting anyone who's here to race
Let's face it, the sim has a bunch of road cars, that we racers choose to race with.. but they're road cars, with road-legal tyres (simulated) etc. Are we really the ones doing it right by racing road cars? So the simulation allows us to set the cars up for racing massively.. but they're still road cars, not race cars, when we leave the pits. Wouldn't we just be better cruising in those cars?
The puritanical "if it's not racing, it's not LFS" doesn't actually have any weight. If you're able to do it in LFS, it's LFS. Enjoy it.