I'm going to be a contrarian here and take issue with the underlying assumption that loving your job is particularly important or desirable. We like to think that the choices we make in life are not (or shouldn't be) trade offs, but most of the time they are; particularly the choice we're talking about here. Generally speaking the more personally rewarding (which for purposes of this discussion I'll label "fun") jobs pay less and the ones that pay more are less fun. That's pretty much how supply & demand works; higher compensation draws people to jobs until supply satisfies demand. Factor into that the scarcity of certain desirable skill sets and you explain a lot, although not all, of wage discrepancy.
I've never really worried too much about loving my job. The word love sets an unrealistically high bar, one that's almost impossible to define. Moreover we're not talking about a binary outcome here, it's really a spectrum: there's a lot of space between hate, dislike, indifference, like, and love. Considered in isolation would I like to love my job? Sure, I guess, but considering a career in isolation is so artificial a construct as to be meaningless. The reality is that most of us have other constraints that are as, or more, important than our personal preferences. I consider taking care of my family the highest priority, full stop. So if sending my kids to college, for example, requires working at something I don't love so what? This is the sacrifice that each generation makes to increase the possibility of a better life for the next one. Personally I think it's ok to be a bit selfish; parts of our lives need to be just for us. So I think it's ok to make unilateral decisions about friends and hobbies, for example, that are just for me. Careers and everything that goes with them, however, have a huge impact on other people in our lives and their interests not only need to be considered, as far as I'm concerned they're paramount.
Yeah, there are nuanced arguments about if I'm happier my kids are too, but that's a straw man position. I'm not talking about taking a job you detest (although making that argument wouldn't be difficult) I'm saying that the search for a job you love is inherently selfish, frequently fruitless, and can easily have unintended costs that affect other people.