Jesus healed in a number of different ways, and when Moses got peeved with the Israelite's complaining and said very free translation "Don't you nitwits remember how we got water for you last time?" and hit the rock again instead of speaking to it, God called Moses on the carpet about it. That seems like a small matter to us, but God thought it was a big deal. I suspect doing things the same way over and over is an invitation to try to use the procedure magically--with us in control rather than God. We like simple patterns and procedures: "Want water, hit the rock with Moses' staff." Actually being in a relationship with God is more complicated.
I remember the scheduled "Revival" services. Many weeks in advance we'd be told a revival preacher was coming, and we needed to invite people and be ready for revival. It sounds a little like magic, doesn't it? Crank up the volume and get the kids rocking, and you'll have the Holy Spirit inspiring the youth. Magic. Have 24-hour prayer services and the Lord will work. And He probably will, somehow, but sometimes the response takes a very long time. If I have the numbers right, Monica prayed for Augustine for about 17 years.
It's so tempting to feel in control.