If something can happen, then there is only a chance. Certainty could be anywhere from 0.01% to 99.9%. If something will happen, then it is implied that it will occur with 100% certainty (provided all criteria are met).

Difference in title aside, the phrases do not mean the same thing.

My first thought, before reading the article was: "good: fail quickly". From reading the article I get: "Focus only on funding and marketing will kill your startup fast", but not, as the title implies, that there is a downside to being funded and using that money in a not too stupid way.

I blame the companies priorities if it's blowing all funding on a marketing campaign, while having a stagnant product. I assume without funding they would fall over the same wrong priorities, just not as fast.