I suspect that Megahn deliberately presented herself as a vulnerable but brave Orphan Annie, alone in the world but bravely making her own way (cue: trembling lip; left eye, one tear - GO!) to tug on Harry's heartstrings in the early days of their relationship.
Which is why Harry was never allowed to meet Thomas Markle or Uncle Mike and why Thomas couldn't be allowed to attend the wedding. He wouldn't have followed the script
This is precisely my own view, @Abouttimeforanamechange, but again if Harry had any judgement he might just have wondered why he was kept well away, and if there might be another side to "my dad's being awful to me" - especially after Meghan's previous gushing about Thomas
Undoubtably her dad made mistakes too, but to many of us the calculation was obvious, as was the fact that the chances of him appearing at the wedding were always nil
Sorry dad, but you don't fit this latest version of my self-invention, so you're just another who'll have to be cast aside ...