Because you have no idea why he seems wishy washy; it's not automatically because he's not as into her as she is into him. Maybe he's anxious, maybe he's self-conscious, maybe he feels like OP isn't that into him for some reason, but he's otherwise an amazing guy. Maybe he's married. The only way to know is to communicate expectations clearly. And it hardly draws it out. Either he schedules something and they good to go, or he doesn't and they're done.

I'm not suggesting she agonize over him being wishy washy. I'm suggesting she confront him head on and get this shit settled. If he wants to play games, then she should drop him like a hot potato. But give him a chance to be awesome.

That "there's always more fish in the sea" attitude is why online dating is so shitty. Great that you found someone who checks every box and apparently was able to walk the perfect line in the beginning without you communicating what you expect or need. But if someone tosses out every person who makes a misstep without clarifying, they're going to miss out on some potential cool people.