Nowadays it is very necessary to focus on the act of working on the things that one really wants to do in life, such as career, lifestyle, etc. There will be times when, as you say, we will have to do a job that we do not like but only to achieve what we want, and perhaps this is a detail that many people lack to be successful in their work, that there is no vision or reason strong enough to give the best of us in our work.