I have the book and cook book. The cook book gives a good idea of items to feed baby. For example from 6 months it recommends large stick shaped pieces of food, including fruit and veg crusts toast large pasta shapes and soft meat patties or croquettes. This is from 6 months - in the 7-9 month section it recommends the above and smaller soft foods such as strawberries and chunks of cooked vegetables , slightly crunchier fruits and veg ( depending on teeth)
It is not until 9-12 months where they are recommending pretty much anything!
That gives you 3 months of fruit veg and meats and breads to explore before meals are properly introduced.

Yes blw is about your baby sharing in family meals but to put a curry in front of a 6 month old and expect them to get on with is another thing. Also an adults diet these days is way too salty and sugery so unless your a healthy food fanatic the families diet will have to change or a babies diet will always have to be a little different to the rest of the families.
Blw to start with is all about finger foods and then to progress into meals.
To allow baby to explore foods in a finger form as a single food means baby knows the texture and taste of that food before they are then combined in a meal or move on to the next experience.

There is food you expect them to be able to handle at each age, yes. But that doesn't mean that's all you should offer them. When LO was 6 months, we made ratatouille, making sure the veg was cut into strips. Chilli con carne with chunks of pepper. As he progressed, we cut the bits smaller.

BLW is sharing family meals from day 1 of weaning.