Look, a single quote like this is never going to prove, to the satisfaction of the sceptical, a controversial thesis. But whole sections of the book are dedicated to arguing in favour of what Thiel calls the "determinate" viewpoint (that what matters is vision, planning and execution, and "secrets") and against the "indeterminate" viewpoint (it's all social context, luck, insurance, EMH). See for example this lecture in the series on which the book was based. It's possible Thiel goes too far in some instances, but the point he's making here, that people heavily underrate planning and heavily overrate chance is clearly true. As he writes elsewhere in the book:

Indefinite attitudes to the future explain what’s most dysfunctional in our world today. Process trumps substance: when people lack concrete plans to carry out, they use formal rules to assemble a portfolio of various options. This describes Americans today. In middle school, we’re encouraged to start hoarding “extracurricular activities.” In high school, ambitious students compete even harder to appear omnicompetent. By the time a student gets to college, he’s spent a decade curating a bewilderingly diverse résumé to prepare for a completely unknowable future. Come what may, he’s ready—for nothing in particular.

If you have a substantive counterargument to make, I'd like to hear it. But your drive-by insults aren't helpful.