If a sculptor takes a piece of stone, they might begin to carve out the general shape with a chisel and a hammer. Eventually the stone will take shape and the sculptor will use sharper and more precise tools to get the fine details. When the sculptor started, he or she had an intention of what the finished sculpture will look like. As he or she worked, the tools changed and the stone became more refined until the vision was manifested.
This is similar to the process of yoga. It starts with your intention. As you do the practice your tools change. If you have the intention to be present you might use a crow pose to find it. As your physical practice advances you might use one legged crow pose to be more present or balance on just one arm or even one finger. But eventually you'll realize that it was never the pose keeping you present but it was the intention from the beginning and the pose never actually mattered.
When you give an artist a tool, they don't care what tool it is, it's their intention and vision that creates the art not the tool in their hand.
Don't confuse the tools you use for the actual practice.