Karma is used in Hinduism & Buddhisim to explain why some people lead and have the kind of lives they lead and have. Why some are so undeservingly fortunate, leading luxurious lives from cradle to graves and others are doomed to an unjust lifetime of misery. It is punishment / reward for the deeds of past lives. It is a kind of generational cosmic justice system which does not require an overseeing administrator judge. You just reap what you sow, if not in this life, then the next and the next and the next.
If WC (as a non-personal martial art) has a 'bad' karma and its practitioners are somehow imbued with a negative transmigrational force, then I suppose Bruce Li is a prime example. But then again look at Yip Man, his master, and thousands of others, is there a trend? Even if there is, does it prove anything? If depends on which side you're arguing on I suppose. We know which side your chemistry teacher is on.
And here is another "karmic explanation" on why some people die at a very young age, at say one or two years old or even minutes after birth. If there is ever a divine Will and Purpose to the earthly birth of a human life at all, then why take that young incognitive life away so quickly after birth which makes no logical sense.
The 'explanation' is these were people who committed suicide in their previous lives, 'illegally' ending a given life-period prematurely. And thus needing to be reborn to live out whatever is left of the previously given life-period, be it a minute or one year.
I'll rather be happy than right, anytime.