I'm saying it's irreconcilable that the phone be like phones we know now (18:9, minimum bezels), and the tablet be like tablets we know now (18:9, minimum bezels). If we have either form conform to what we know now, the other must be very different.
From a quick google search to https://www.cnet.com/topics/tablets/best-tablets/large-table..., I see no such thing.
Tablets typically are 4:3, which would result in a phone being 3:2 which would be 25% shorter on 18:9 phones, and 15% shorter on 16:9 phones, which is a reasonable departure from the norm, and ultimately means neither the phone nor the tablet are well set up for watching films/TV.
I think you may be seeing a different argument than OP was making.