I've tested this on a few different browsers and noticed that the bullets are not indented properly only in Google Chrome.
Please check the below image:
You'll notice some other differences in the way different browsers display the list, e.g. the margin between bullet and text, the size of the bullet itself, the overall font size...
So you only need to manually indent the bullets if the majority of your users are working with Chrome. If multiple browsers are used throughout the organization, I'd suggest double-checking any style customization in all of them, just in case.
This isn't the first time I've found Chrome annoying for styling Moodle courses. It keeps doing awkward stuff like adding random spans with inline styles concerning font-size, line-height etc... It just has its own opinion about how pages should be displayed and that's that