It would be like putting stock tickers on all the hundreds of competing JavaScript frameworks on GitHub and asking the average non-dev what to invest in.
The vague idea that “if Tesla the company does well, TSLA the stock goes up, in a loose sense” is much simpler and it’s hard for me to imagine there are many retail investors that don’t understand that on some level.
I’m not sure how the principle is not actionable in practice. Surely recognizing that everyone has iPhones and that trend isn’t stopping is enough for a lay person to recognize AAPL is reasonably safe as an investment.
You might of thought AAPL was a safe bet at the beginning of the year, but now it's down 22.23%. At this point we don't know if it's going to take a year to recover or a decade.
So I know I am preaching to the choir but it's not just "company doing well so stock is safe". There's the context of the overall economy not to mention a lot of companies look like they are doing great until one day they don't.