The only person it is benefiting is yourself, so I would put my feelings to the side as I think the consequences are worse as a MIL.
See, i find that attitude downright offensive.
How the fvck would you know who is 'harmed' more in this equation?
YOUR lived experience is NOT that experienced by other people. DO YOU GET THAT?!
Some MILs may be fine at not visiting; some may not want to so early; some may be hearbroken not to see the newborn. Some new mothers may feel fantastic; some may be struggling to deal with post-birth medical issues or bonding. There's a whole spectrum of feeling in MIL and potential new mother.
But no one, no one should think they know what a new mother should or should not do or what is "right" to feel in this circumstance.
If anyone is being rational and caring, they should act like the wellbeing of mum and newborn is paramount.
In some new mums, that'll be helped by lots of social visits from family. Others, may just want a quiet shower and quiet time to recover. Neither is wrong.
But this nonsense that some people are spouting here in this thread about being able to assess the "greatest harm" is really ridiculous - you couldn't possibly comment as a rule! You are not other people! You do not have other people's family dynamics, medical history, and so on!
There is NO RIGHT here.