This show could have worked without the cooking experience background if Meghan had had even a small reputation as being a regular hostess or party giver.
At every normal social occasion - family birthdays, anniversaries, Christmas, Easter, Thanksgiving etc they put out some sort of press statement about how they are celebrating quietly ‘as a family’.
They’ve never been known to host an occasion after they got married in the UK or in the last five years in the US.
So she has no formal cooking experience (like Jamie Oliver or Nigel Slater), no demonstrated expertise in food / restaurant industries (like Nigella), no demonstrated interest in cooking regularly and experimenting with recipes as an amateur (like Jennifer Garner) and no demonstrated interest or experience as a hostess of medium to large gatherings.