The issue with the Jamie Oliver thing is, there's no way Jack Monroe wasn't absolute catnip for TV producers.
She's a celebrity with a huge following, and she's exactly the kind of person TV adores: a middle class pretty young white girl who pretends to be a minority, so they can tick the diversity box without actually having to hire a minority.
I would bet money that TV producers were absolutely desperate to give her her own TV show.
The only reason she's not got her own TV show is because every single time she's "auditioned" by being given guest spots on cooking shows (yet guest spots are how companies audition people for their own shows) she's been completely unprepared, fucked up her recipes on live TV, generally been unprofessional, and simply been unable to do the job on even the most basic level.
TV presenting is a skill. You might not like Jamie Oliver but he's clearly a skilled TV presenter.
Jack has been given endless second, third, fourth, fifth, sixth, seventh chances to 'audition' (most people would never get even one second chance after fucking up so bad) and all she has to do to get her own TV show is actually do the work and be prepared next time she's asked to do a guest appearance. Does she really expect her own TV show when she physically cannot speak and cook a basic recipe at the same time?
She's had every opportunity handed to her on a plate and fucked them all up.