I think that she's so focused on making content which she thinks is relatable and engaging that she genuinely doesn't find time in her day to five Rex a bath (or so it seems). She's busy making montages, making and unmaking her bed, fannying about with snacks, doing pointless arts and crafts, the list goes on and on. And that's not to mention how much time she probably spends on her phone scrolling instagram and reading on here. By the time Rex should be in a bath she's probably exhausted from being so fake all day and just can't be arsed spending half an hour bathing him and putting him to bed. We've seen over and over again that he can self soothe to sleep almost anywhere so I don't think she would really have a fight on her hands if she bathed him, got him in jammies and then sat quietly with him. But instead she's using this time to be online talking tit as usual.