Its just more bling to add to the endless amount of crap newbies buy when biking.
Bling? A Mudguard? Are you mad?
Propper bike maintenance is everything that no piece of plastic can replace.
Ever heard of “prevention is better than cure” If you can keep the gloop out of your dropper seatpost etc, its less likely to need servicing.
If that means buying expensive mountain climbing jackets then so be it.
Or £20 of plastic to keep you clean.
The right clothes will ultimately decide how happy you are whilst biking.
I don’t deny that, but you’re missing the point.
In the dark?
And why not reduce the filth that gets stuck to your glasses?
Good grief.