Stupid disk wiper intervals

Hello, do you also think that the windscreen wiper intervals are impractical ? First of all: there is no slow-act for the rear, either completely or not at all – is totally stupid, just in the back you usually only need it sometimes, every time by hand is shit. Also for the front (there is slow-interval circuit) is stupid, that you can not tap the thing for a short time, so that it only makes back and forth (splash water away and finished). You have to turn on the thing completely or nothing goes on, which sucks.