A question for you: let us hypothetically assume that you have identified a particular basket of stocks worth $5,000 using this approach, applying your personal estimate of their risk and your investment goals, and purchased them. Three weeks from now you receive a call from the CTO of one company you invested in saying that a vulnerability in the hypervisor at your VPS provider allowed a compromised co-tenant to execute commands in your instance as root. What is your plan of action for preserving the value of your investment, and does this retroactively change your approach to valuing the stocks you have purchased?
This is a silly question, of course, because if one invests in publicly traded securities one does not have to operate their businesses for them. That is one of many reasons why owner-operators of businesses do not value them as if they were equivalent to investments in publicly traded companies.