1. All thought is fantasy
2. Some of that fantasy happens to pass the test of reality
3. Most thought is borrowed
4. Thought existed before you, will exist after you
5. Society is the manager of thought, not the individual
6. Thought advances as a whole
7. Without collective thought as a substrate, the individual won't function
The name of the theory derives from the philosophical concept mimesis, which carries a wide range of meanings. In mimetic theory, mimesis refers to human desire, which Girard thought was not linear but the product of a mimetic process in which people imitate models who endow objects with value. Girard called this phenomenon "mimetic desire", and described mimetic desire as the foundation of his theory:
"Man is the creature who does not know what to desire, and he turns to others in order to make up his mind. We desire what others desire because we imitate their desires."
For example, in the simpler case of pure technology. Try building in React and only then do the React course. You’ll come with the confusion and questions and know what to get out of it.
In business it is trickier because the amount of poor information out there is ridiculous. Even good information can be bad if it is bad for you specifically. As people often way overconfidently propose they have cracked the code to making money.
Which is ridiculous.
It is easy to see how silly it is if you reframed that in terms of employment. “The secret to $200k/y. Our blueprint shows you how to make $200k/y as a medical doctor…”. What if you hate being a doctor or are no good at the various innate skills needed!
Another part of the answer is that very few people are experts at all of the skills needed to start a business: being a domain expert in some field, understanding technology, understanding business and money, understanding people, being good at communicating, understanding design, being a good writer, etc. If you're smart, you know that you don't know everything, and you're willing to hear out the advice that others provide.
The important thing is some people have informed opinions on topic X.
Most people don’t have an informed opinion on topic X.
Where topic X is not a topic where all opinions are equal, e.g. who should be elected to office Y, the appropriate role of religious practice, and what is sexy.
Starting is not incompatible with valuing informed opinions.
Sure finding informed opinions can be hard without experience in topic X. But learning to identify uninformed opinions is straightforward work.
Make stuff that works first.
But, yes, I would say sometimes it’s beneficial to not only ignore, but also to not even know how others before you have solved a similar problem. Pathways established in our minds are obstacles to invention.
You may or may not be capable of learning from the mistakes of others; which is the prime reason for listening to others. The other reason is gathering ideas for things to do; and it sounds like you've already got that covered.