Something of the 'Windows-ization' (for want of a better term, I admit) of big FOSS DE practices is this practice of spewing all sorts of shit into the system logs.
Gnome is a perpetual offender, with endless .js errors, but this is something that is definitely getting worse over time.
If debug output is only useful for developers, don't use that as the default logging level. For log hounds (most sysadmins, I would think) it is immensely frustrating having to wade through this shit to try and solve problems.