Rasher, stop worrying / seeing problems where there are no problems.
Yes, it's possible to damage anything and (more worryingly) yourself if the bike falls at an unfortunate angle and / or strikes something at just the wrong angle or a malicious person damages it. As I said in a reply to your question in the EWS thread, bods are more likely to break a mirror or snap a Vario off in a gentle spill in Tesco's carpark whilst on the hunt for root vegetables than do much more.
If you go through the
Wunderlich catalogue you will find dozens of items to protect anything from the oil filler cap (somebody may unscrew it to fill the sump with sand.... though nobody has ever reported this happening) to the swing arm pivots, to the master reservoirs for the clutch or brakes, to the front forks. That a spill hard enough to break some bits may well result in the handle bar snapping off seems to escape some bods' attention.
There was one thread I can recall where a bod did damage the the slow running sensor I think it was, somehow. He was away on holiday, posted a picture and the symptoms and got advice. He then rode the bike to a dealer's some way off and all was well. Would the item have been protected had he bought the guard? Nobody knows. For all anyone can guess the guard would have bent in and done more damage..... or maybe just the securing bolt on the sensor came out, leaving it dangling about? I really cannot remember.
Buy all the guards and bling you fancy. It's your bike. Marry these to careful avoidance of the bike falling over at all, thereby safeguarding yourself and the vehicle.
If bods report back that a bolt on piece
definitely saved something, consider that I keep a pound of butter in the fridge to keep the elephants away. That works incredibly well, too.
PS The most useful thing I have bought? A Mudsling. Why? It helps to protect the expensive piston rod (the bright yellow spring does not matter) of my rear Ohlins. An umbrella carrier, home made out of a plastic waste water tube. Bods laughed until it lashed with rain on our days off.