Proverbs 11:14 is, obviously, a proverb - meaning it is a wise utterance that imparts practical advice. In this case, the practical advice (apparently given to a future ruler) is that there is safety in surrounding yourself with good advisors, whereas acting without consulting sound counsel might be disastrous.
It's practical wisdom - it's not law, and it's not a promise - so it's meant to be a general saying about the way things usually work. Obviously it is possible, at least in theory, for a very clever king to govern well without the advise of good counselors; conversely, he might also surround himself with very stupid people and get bad advice. But generally speaking, that's not the way it works.
The application for a Christian "seeking God's will' should be clear enough: if you are uncertain about a decision you have to make, seek out the help of other mature Christians whom you respect for giving sound advice. I don't necessarily see that as part of a roadmap for finding "God's will for your life" - after all, so much of what falls under that rubric really just turns out to be practical wisdom in disguise, as it were.