I've been paying plenty of attention. Pre financial crisis, ie the last time interest rates were high enough for consumer rates not to be distorted by being unable to be negative, UK bank profits were far higher. It's got nothing to do with dividends.
If the base rate is 5%, the best sustained savings rates will be in the region of 4% and the best mortgage rates will be in the region of 6%. The net interest margin is 2%. But with base rates at about 0.5%, as they have been for most of the last 14 years, savings rates can't go below 0%. Most accounts have been paying around 0.1%, but you could maybe get 0.5% by shopping around. The best mortgage rates have been about 1.5%. The net interest margin is 1%, or maybe a touch higher. Hence net interest margin has been compressed versus 'normal' interest rates and banks' profits have been lower.
Obviously that is a simplification and there are many other factors involved, but the recent rise in interest rates does not mean that banks are making excess profits. Indeed, with the economy going into a downturn, they have to set aside more money to cover expected defaults.