Finding right people for customer interviews is hard
If one can't find them, how can one validate the idea, tweak it and ultimately find customers?
Conducting customer interviews is hard
How else can you close a sale with the potential customers?
Figuring out MVP is hard
How does one manage project management, not to mention a business without requirement analysis and prioritization? Also, a great question to answer: would you use it like that?
Designing experiments for validated learning is hard
It's all about risk/reward. Again, this is not the mindset for entrepreneurship.
Pivoting is hard
How else can one better grow the business, but to understand the market?
Informed-optimism is the way to go! So man-up, if you really believe in your product, you will do it. Also, I don't think more frameworks are what we need. Guidelines are good, so to know what to keep focus on. Besides this you only need discipline
*I'm not an accomplished entrepreneur, so take this with a grain of salt. But this is how I feel now. And that's what worked for me before.