I think the key here is to just accept the fact that this is only one of many surveys over many different years that have shown that some manufacturers have Q&A issues. That's just the way it is. It also says that 6 out of 10 of your anecdotal mates won't have problems or 6 out of ten people you bump into at parties won't have problems with their can-am or BMW or Harley or whatever. I am sure that if you just spent big bucks on a bike that you will find that one guy out of 10 that had a YAMAHA grenade on them.
Doesn't mean that the riding experience between failures is bad, just means that you have a higher chance of selling the bike before the warranty runs out.
I ride with a BMW guy a lot and he loves the anecdotal things about KTM's falling apart. I notice that KTM is missing again from this survey.
There are two people at work that have both a KTM and a BMW, Both have had what would be called medium issues in within 5 years. One BMW F800GS with a fried alternator for no apparent reason ($1300 bucks thanks) and the KTM with a known cam issue. ($450 in parts thanks) My friend with the BMW has a spare BMW out the back under a tarp he bought cheap.
My mechanic owns Japanese bikes. The only ones he doesn't ride much are the 70's Katana and the 70's CB750.
I knew a few old geezers on old BMW's that had lots of miles. They do mention eventually that it was easy to get parts to rebuild them and they went for 100,000 miles between rebuilds with only little problems to do with carbs etc. That was back when BMW made one boxer platform and that was it.
The state police force now ride YAMAHA FJR's and I had a $250.00 discussion with a nice officer on the side of the road one day talking bout his "crap" R1200RTP and that they were going to dump them soon. Too many off the road too often and the spare oil he had to carry.
Bumped into guy at a motel on a ride once. He had one of these that was dirty rusty and still motoring along at 350,00km with only 1 rebuild.
An affordable 900cc HP2 would probably be a nice thing. I wish BMW would make a bare bones 900cc boxer again. Do a Harley and do a bit of nostalgia retro for the Hipsters. A Deus Ex ADV Boxer with a better seat.
So that's my anecdotes for you.