You can make a good estimate of if a frame will suit you or not from the numbers, no one has the time to try every single bike so the only option is to whittle the choice down to a realistic number by using the charts provided.
People do indeed come in different shapes and sizes but I’m very average in my averageness and so expect to fit an average bike.
This bike, much like every other bike released in the last few years is supposedly long, low and slack, which it is if you compare it to the last model, but then the last model was long low and slack compared to the model before that and pretty much everyone is changing at the same speed so the LLS phrase doesn’t really mean anything unless it is genuinely when looking at similar bikes.
When I see LLS, I expect LLS, not predictably different in the same ways that everything else is predictably different.