Photoshop is filled with redundant features. Amongst these, none of them have more redundancy than selection tools. I just made a mental count of about a dozen different ways to create a selection in Photoshop, and when it gets right down to it, that's not enough. That's why there are third-party solutions, and I have to admit that of all of the solutions I've seen, none creates as good of a selection as Fluid Mask 3. With great power comes great responsibility, however, and that means that Fluid Mask has a greater learning curve and is a bit more challenging to learn. But the results you achieve will be exactly what you wanted.