I fear not the man who has practiced 10,000 kicks once, but I fear the man who had practiced one kick 10,000 times
What is Bruce Lee telling us? With one short sentence, he said it all!
Making money on the Internet and growing your company through modern marketing channels is not a battle of resources, but one of skill. You can read online about companies investing millions of dollars into digital growth and not getting anything in return. The Internet enables small, but skilled and focused companies to grow and win against their bigger competitors.
What Bruce Lee is putting in perspective for us is that companies who have practiced the same moves 10,000 times over and over and over again will in general be able to conquer more powerful foes, vs the firms who have learned 10,000 different ways to fight only one time. A company that practiced 10,000 forms for fighting for the market share will look good on paper, but in real life and on the Internet, it will always be far less skilled and powerful than the one that practiced the same thing 10,000 times. This cannot only be applied to business but life as a whole.
The quote is about the focus. It is always better to thoroughly understand and carry one task to the point where you master it, rather than trying to learn hundreds of alternate versions of the same task.
To specialize in something (like we do) is always more powerful and deadlier than to try thousands of other things. Business survival and fight for market share on the Internet is war.