People often underestimate how hard it is to get a better job. You might look in the job ads and see ten jobs you might be interested in promising better terms and better pay. But when you actually start applying for the jobs you might only get five interviews and then only one or two of them offer you a position, at worse terms then you expected. And the entire process might take over a month. It is even worse if they know you are not currently working as they know you are more desperate for a job. So even if you think you can get lots of better offers in a day then your current position it does pay off to stay in your current job and spend some time finding the job you want at the terms you want.