Smart if you can get away with it. For non trivial things you can't quite get away with it.

I've started asking Claude to make me a high-level implementation plan and basically prompt ME to write it. For the most part I walk through it and ask Claude to just do it. But then 10% of the time there is a pretty major issue that I investigate, weigh pros/cons, and then decide to change course on.

Those things accumulate. Maybe 5-10 things over the course of an MVP that I wouldn't really have a clue about if I let Claude just dutiful implement it's own plan.