The officials have to judge, and I’m fine with that. I think you can write guidance that helps avoid stupid decisions. Penalties for handball for example must only be given for offences that, if they are not clear cut infractions of the laws, have significantly adversely affected the attacking team.
You can’t turn referees into robots. They have to use their judgment. We had a classic example of the ref getting that horribly wrong yesterday when he penalised Akanji for almost getting his ankle broken by Casemiro, who should have had an “orange” card.
We also saw judgement that could be questioned when KDB was not awarded a pen because ref and VAR decided. that Fred had not impeded him. I’m not sure they got that one right but I’m not adamant that they didn’t. I do think it was more of a pen than the Grealish handball.