If you need money immediately to pay your rent or debts etc. then you probably can't hold out for your dream job and need to take something else in the meantime. That doesn't mean it's always better to take "whatever job is available" though. The kind of jobs that are pretty much always available are often truly awful, and it might be better not to take a job where they are offering you less than the award wage, or have unsafe conditions or want you to do something that is against your personal principles (stripping, ripping off the elderly by selling dodgy products, cutting the beaks off baby chickens...). If you're lucky you can find a compromise in a job that might not be what you wanted but which doesn't make you hate yourself.
I'm very luckily in a position where I can afford to keep waiting for (well...working towards!) my dream job. I think that if you are in a job that you hate that can impact on your health and wellbeing and I also think that sometimes it's better to have a longer blank space on your resume than LOTS of short jobs because you keep quitting jobs you hate. But if you are in a position where you desperately need the money then you don't really have much choice.
When I left School after Grade XII, I worked at four different jobs in four months, each one 'improving' from the last.
I had applied for my 'dream job' upon getting my Examination results. I was called in for First Interview three months' after that Application. I had Second Interview a week later, at which time I was told 'you've got the job'. Started two weeks' later.
I just 'floated' out of the Manager's Office, I was SO thrilled, because I'd decided that was THE job I wanted, by then, 15 months' earlier, on a School Bus Tour to Snowy Mtns & Melbourne.
I was employed for a total of 35 years' with that Company. I loved the various 'jobs' I could do within 'the job'.
I'd pursued 'my dream', got it, lived, & loved it!
I consider that 'richer than gold'!
I was VERY fortunate!
I've just taken a job that was available, rather than be unemployed, but too many little stints of work on a resume can make it seem like (and I've been asked this in interviews) that I won't be able to stay in/hold down a job for longer than a few months.
Take what's available, though you can still keep looking. If you think you can just keep holding out, you'll end up like my useless moron nephew who, at 33, has still never had a job and just sits around leeching the public purse on welfare. His dream job is to be a mega-famous Hollywood actor (Hello? Reality check anyone?).
Thanks for posting, Poppy. I have always felt guilty for not yet having a "proper" job as my husband and I had our children as I was leaving uni, but this makes me feel better. LOL...sorry about your nephew.