This even makes Leia's excited "Ben Kenobi? Where?" response to Luke on the Death Star make so much more sense.
Not to pick on you or single this out, but this line of thinking always drives me nuts. Nobody when watching ANH was wondering why she'd be excited that the person she had sent a message to asking for help was there attempting to help.
Sure, obviously no one was thinking this.
Mostly because for the purpose of ANH it doesn't matter how well leia knew kenobi.
And also because star wars is full of moments where it appears characters must have been reading the script but the story carries you past it, so it is fine.
But that doesn't mean anything in ANH supports the assumption than Leia and Ben had definitely never met.
Ben and Leia having had an adventure together 10 years ago seems fine tbh.
Would I have tried to do to write this show without Leia? Yep. But not because of what the existing canon says. Just because the show would have more room to breathe without her.