2nd gear = lower torque, higher wheel speed than 1st, at the same engine speed. Short of a truly slippery situation (bald all season tires, steep grade uphill, sheet ice etc), a light throttle foot will probably do the trick...
That said, I use the ‘2nd’ switch all the time coming from a manual trans... I toggle it on/off when I know I want the car stay in 2nd gear (and that having the car jump between 1st and 2nd and back would be unnecessary and/or unhelpful). For example: low speed traffic, overnight cold starts/driving, yield merges, etc.