Because someone's paying him money to have an opinion, so at least make an effort to have a considered opinion, informed by some facts and solid evidence. Otherwise, your opinion's worth shit. You're entitled to it but it's worth shit.
It's the equivalent of him not making the effort to train during the week, then turning up on a Saturday and playing shit.
Can you turn up to your job, trot out a load of lazy shite and be paid for it?
You're right though, Lee Hendrie's opinion ain't worth anyone's time or money.