Perfect! I found the blog post you were looking for. It's "Climbing the Wrong Hill" by Chris Dixon (not from mathewanders.com), published in September 2009. This is the exact post that uses the mountain peak and local maxima metaphor you described.
The Core Metaphor:
Chris Dixon uses a computer science concept called "hill climbing" to explain why smart, ambitious people often get stuck pursuing the wrong career path. Here's how he explains it:[1]
