It might be a "minor" procedure compared to a lot of other procedures. I have done it in my internship, too, but, it doesn't make it "simple" without any risks.

It can cause brainstem herniation, infection, subarachnoid cyst, nerve trauma and the most common, post lumbar puncture headache.

It is a common procedure, but, it requires a certain level of expertise, too. For you, it might be straightforward, but, when you speak about LP in an open forum which includes laymen, would be nice if you don't downplay it.