I'll chime in as a therapist, too.
MON has a point about some therapists just needing some direction and being able to respond to what the parent suggests and provides about the child. But I would also caution you to not spend too much time in that effort. I often have parents tell me about therapists who are just, quite frankly, not good with kids. Most recently I heard about a speech therapist who actually belted a 3 y/o into a booster seat at the table to get him to "focus" - like that was going to work!
There is both a science and an art to being a therapist. Some people get the science but not the art. Some are really good at relating with the client but not knowledgeable in the science. Like any other professional, you get a full spectrum of abilities, knowledge and expertise. It's up to you to find the person with what it takes to meet your needs (or in this case, your child's needs). Don't settle for less!