Failing to finish is common in racing. I am sure a few Harleys DNF as well.
Just because Indian won the first 2 races does not mean they will win them all, that could get boring .
I dont know about ignorant... a lot of people simply like watching what they ride competing.. and in this case it is A LOT OF People. Myself I wouldnt watch most roadracing, except vintage superbike, sidecars, and niw bagger racing.. but that is jmo..