We started on purees but went to BLS as its so much easier (physically, not always mentally... it frazzled my nerves for a while!).

I don't think it's about avoiding spoonfeeding, more about avoiding pureeing. The idea is that when babies are ready they are capable eaters (and also remembering thta not much is needed at this stage so even though not a lot goes in it's not a huge issue). So giving them finger food and allowing them to feel the texture and the consistency gives them the knowledge about the food so they know what to do with it when it gets to their mouth. So pureeing they only get smooth, and when you introduce lumps they struggle because the only thing you've given them is smooth puree so one, they don't know its coming, and two, since it's a shock because they don't know its coming the struggle to deal with it. They also get to know food, and the shape it really comes in. Like a lamp chop or a carrot stick or mashed potato.
This is how I saw it anyway.

But obviously since it's soup, it has to be eaten by a spoon, and since she's quite young she'll probably need to be spoonfed until she gets the coordination to fill and spoon and get it to her mouth with success haha.

HTH