I myself have gone off course many many times

We all do and people who say they have not, are lying.

I somehow manage to get back on course.

This happens, yes. It's even better when getting back on course happens by design.

The thing is the more you go off course the longer it takes to reach your destination.

Indeed, but many lessons can be learned when off course and that can mitigate the chance of it happening again in the future.

However, if you don't go off course you wouldn't know what the destination is.

Hmm, yeah possibly, but certainly if we don't go off course lessons may not be learned, and maybe we won't come to the understanding of how good/productive it can be to be on course.

Good comment you left here, thank you.