Yeah, basically that. I'm back at work in Windows land on a Monday morning, and pondering what sadist at Microsoft included these features. It's not hyperbole to say that the startup repair, and the troubleshooters in settings, have never fixed an issue I've encountered with Windows. Not even once. Is this typical?
ETA: I've learned from reading the responses that the Windows troubleshooters primarily look for missing or broken drivers, and sometimes fix things just by restarting a service, so they're useful if you have troublesome hardware.
The Windows network troubleshooter is black magic from the depths of hell itself and is very opinionated and selective in choosing which issues to fix and whether you'll need to bargain your soul to recieve said fix. I have red hair and find it doesn't bother bartering with me, but your mileage may vary.
It fixed an issue for me once back on like Windows Vista I think.