As pointed out by DM, the success at all costs approach has, well, costs. It's not worth it. Nor is it necessary. Succeeding with a balanced approach might require a modicum of luck, but let's face it, oft times you make your own luck. Times are hard in academic science and don't look like they will improve in the foreseeable future. We're all having to work hard to survive. Perhaps we're on the verge of a "great science cull". Nonetheless, some will succeed. But they won't necessarily do so by working even harder. They will survive by working smarter and being "lucky".
You have to ask yourself, "Do I feel lucky?"
Well, do ya, punk?