Many of the answers to questions about home network problems simply say something like "Use a pin to reset the router".
Resetting a router should be the last thing to try after everything else has failed to fix an issue. Any personal settings, such as WiFi network name and pass phrase are reset, and any port forwarding information is also lost.
"I have lost my Internet connection." – have you checked to see whether your connection to your ISP is still working?
"I reset my router and now I cannot connect to my WiFi." – Had you set up your own SSID or pass phrase? If so, you will need to set these up again.
"My WiFi is running slowly." – Have you tried setting the router on different channels. A nearby network may be interfering with the channel you are using.
These are just three examples I have seen recently that got answers to reset the router to its factory defaults.
Leave the factory reset to the last thing to try. Does anyone agree?