I don't think that's the case at all. I think it has much more to do with the fact that she hasn't been on screens in decades and people wouldn't likely recognize her today. Whereas people will immediately recognize how she looked when she was most well known.
There's a couple of good clips of her in The Forest Hills (Horror, 2023) in which she's playing old but not that far from her normal appearance. I particularly enjoyed hearing her voice. I always thought she looked weird when she was younger, here she just looks like a tired old woman.