Earlier quoted context omitted.
I think when stating your opinion against 40 years of econometrical research, including multiple Nobel prizes in economy, you should feel enticed to explain your opinion a bit more than "no I don't think so"...
Please quote a Nobel prize (well, there's no Nobel prize in economy, but surely we understand each other) winner explaining that stock prices are, in actual reality, random variables.
To be pedantic, stock returns, not prices.
As for the quotes, I encourage you to strongly think about the meaning of the work of Sharpe, Black & Scholes and Markowitz applied to non normal distributions (both Nobel prizes, we understand each other).
In particular, try to articulate the relevancy of sharpe ratios between two non normally distributed portfolios.