I'm having trouble figuring out what your objection is.

If we're going to study an evolutionary process, we have to pick a starting point. "How an eye evolves from a single sheet of light sensitive cells" is particularly relevant because creationists like to claim that "half an eye isn't useful, so it couldn't have evolved".

"How does a single cell evolve light sensitivity" is not a particularly hot button topic. Creationists don't drone on about plants.