Given that the esteemed Dame is almost completely blind and has never positioned herself as a tech influencer or aficionada, I feel that her (thoroughly deserved) prestige and social power might be a little wasted on the grand cause of 'the iOS keyboard could be better'.

I mean, I'd agree with her. But it's hardly Joanna Lumley championing the gurkhas, when she's been saying for years that she can no longer recognise even loved ones standing right in front of her. Apple could do a lot better, but I'm not sure they could improve the keyboard that much.