You summarized the life of many, but what's wrong with wanting to work in what does not make us happy in what we like in what motivates us I understand that life is not a whim and we will not always get what we want or dream that can lead to frustration and depression, but it is also sad to work in something just for obligation and not love.
In pretty much all jobs, there is stuff that isn't great, or fun, but still needs to be done. To people expect that it should be others to do that work, so they don't have to do it themselves?