We do actually have texts explaining what troubleshooting does, when you go to the Troubleshooting Mode page under Health Check in the menu, it has 3 paragraphs explaining what it does and how it functions before you click the enable button ??
The plugin lets you look for plugin conflicts, if your site isn’t operating as it should (strange errors, features not working etc), it allows you to run the site with limited functionality on a single user to test and find out what plugin or theme might be causing you issues in the first place.
We’re always happy to get feedback on how we can improve those processes though (granted, multiple warnings for an action won’t be added, that just makes using the feature tedious if you need to click through multiple boxes just to use it, it’s a bad experience, but would love to explore other options). Could you take us through the steps you did after enabling the plugin so we can see if there’s a better flow to consider?