How did her sitting down and thinking about her clothes sudden "consume all her time?"
That is, there are people who spend much of their time doing "lifehacks" through these sorts of peep-hole optimizations [1], and this clothing strategy feels representative of such actions. I can easily see someone who is already a "lifehacker" adding this to their existing system.
Writing that blog post in itself probably took more than a few hours — to write, review, edit, do the graphics for it, etc. If the initial goal was to spend time not thinking about clothes, that doesn't really feel like an optimal way to reach it.
Why not? It's called optimization. You spend time once to improve a process, and reap savings from that moment on.