The longest way round is the shortest way home. meaning

HOME PROVERBS

way

The longest way round is the shortest way home.

suggests that:
If you try a new way that seems better, you might end up doing more work, than taking the usuall, familiar way; It might seem tiring to do something carefully and according to directions, but in fact it will take less time than doing something carelessly and in haste, which means, you might make mistakes and have to repair them afterwards.