I'm on a diet, please don't put words into my mouth. There are months that we have too little rain, but we're far from continuous drought conditions. We're still getting 50+ liters/sqm per month.
The surface water strongly affects farms and forests, but we won't change that by using less ground water (unless the hope is to have the ground water climb to -1m everywhere, at which point we're living in a bog). Additionally, rising ground water might have nasty side effects for plants, as salt in the earth will also be transported up.
Surface water retention is about management, not about offsetting that with savings. We do get plenty of surface water, but much of it will be "wasted" because it'll cause floods. Aggressive diking and straightening of rivers does play a part there, and we'll be wise to adapt to changing weather patterns and climate.
It's a good idea to be aware in general, but local under-supply isn't necessarily a helpful metric, I think. We've had the argument in Northern Germany that we should use less water, and it often went along with reports about droughts in Spain. But we're not Spain, we have plenty of rain (though it's not always equally distributed over the year).
Needless to say that we're not building a pipeline to transport the saved water to Spain. At the same time, we now have to regularly flush the sewers because we don't have enough "natural" flow and we have more issues with rising ground water damaging building foundations.