We don't stay sober for others.
I have always had a little bit of a problem with this saying because I think there are two slightly different ways to interpret it's meaning. In the first (and IMO correct way) the statement means that we should not get sober because other people want us to get sober. If we attempt to get sober due to other peoples desire, we do so for the wrong reason. Their desire is not a good reason.
What is a good reason is to quit drinking for other peoples benefit. Hopefully it is not the exclusive reason for sobriety but it might be a good start. The desire to benefit them allows us to take ownership of that desire to quit.