So much conflicting information
It all depends on your ailments, for someone who has no problem using the sugars from high carb foods, of course porridge, beans, legumes and other cereals are perfectly healthy.
If on the other hand you are becoming resistant to insulin (T2) then the energy(sugar) from those high carb meals, is not getting to where its needed.
That's why you were hungry again mid morning, the sugar that should have fed you was for the most part, trapped in your blood. Eventually that sugar you can't use will be stored away in your liver as glycogen, or fat if your glycogen store is full.
For someone with T2 like me there is no upside to eating carbs, my body can't use them so although I am hungry, I'm getting fatter, especially around my middle. My insulin resistance will get progressively worse causing my sugar levels to rise, which in turn will cause damage to all of my organs, eyes, feet, etc,
As far as I'm concerned a slightly raised cholesterol level is the least of my worries.