FWIW I do have a strong majority of portfolio dedicated to index funds, and have automatic investing set up for those funds biweekly. But there do come times where I see a company, and after some due diligence I do see as a company I believe in and see prospering in the long. Tesla is one of those companies so I bought a fair amount 2 months ago.
Regardless of solicited or not, I do agree with your advice and if nothing else, hopefully readers who fear to ask such questions gain from friendly advice such as yours
I do the same thing in my IRA. Right now TSLA is the only individual stock I own, and it is a bit less than 10% of my account value. I bought it at $29 per share 9 months ago or so, knowing I might take a bath, but I believed in the company's long term business model then and I still do. I feel that this kind of investing minimizes the risk factor.
Regardless of solicited or not, I do agree with your advice and if nothing else, hopefully readers who fear to ask such questions gain from friendly advice such as yours
EDIT: grammar