You have to think about what the suspension is designed to do and trying to achieve. In a general sense, suspension is designed to keep the the tires in contact with road. A secondary component is to increase passenger comfort by reducing the rate and frequency of road conditions transferred to the chassis (dampening). Some performance cars may also use suspension to control body roll. On a really high performance car there is also the need to communicate grip levels and alter chassis dynamics ie brake dive, anit squat, over & understeer, turnin feel and rate ect.... to/for the driver. That usually means going stiffer.
Each mode has certain thresholds with regard to how much dampening, body attitude control ect are different. Track mode let's me feel every thing on the pavement and exactly how much grip the tires have at any given time, and corners super flat with almost no brake dive or squat. The car is on rails! But its also becomes a princess and the pea, on the street you feel every expansion joint, every ripple, everything all the time, and hitting a pothole in this mode even minor ones, well I don't know your roads but there are some here that will make you physically pull over and check the car for damage afterward. It's not that suspension can't react fast enough its that the dampening is set to communicate the feel of the road so the threshold for the dampening is going to transfer a ton of that shock to the chassis because in effect that's what we are asking it to do. Tour is the opposite it seems like its number one thing is to isolate the driver from even the most vicious impacts, but it comes at the price of increased body roll, brake dive, squat, and vagueness for the grip levels, which is great if you're on rough tarmac because the dampening rate is so high.
So yeah the suspension reads and reacts to BOTH the road and driver inputs far faster, each mode is optimized for certain thresholds to achieve certain objectives, so it is not a dumb single-setting system but it has the same principle as eating soup with a fork, it can be done, but it's not the right tool for the job and the threshold for success will be far different is one uses a spoon.