My practical reason against this? I'm young. I have 80k in student loan debt. I can make headway into my indentured servitude (and create space to later accept greater risk) even as an early developer in a startup, throwing money at those loans. I can also learn from that experience, and build up my own projects with friends in my spare time that will likely blossom into a company someday. But I can't yet afford to pay myself on a shoestring.
The OP gives great advice. But I was amused by the Dorsey quote referring to "...founders - who may not have been there at inception."
Let's take some highly desirable attributes in an employee and give them a label "Rockstar". Er, no. "Founder".
When words are the currency of persuasion, expect inflation.
At 40, I am reminded of how little I knew 2 years after finishing my schooling. Yet, I had the audacity of believing I had it all figured out...for 5 minutes at a time. Then, I would tell myself "You're foolish, but that's OK, now is your time to be foolish."
When I read articles such as this one, I rejoice at the idea that youth is eternal.
What's the point of redefining "founder" to mean "good employee?" There is nothing magical about any of those criteria you listed; they're just basic aspects of being an effective human being.
payola 2.0 is your pitch? Uh... don't quit your day job...
Terrible advice - quitting your job to be a founder does NOT instill you with the necessary skills and mindset to be a successful founder. The skills required to succeed as a founder does not appear just because you call yourself a "founder". Things like negotiating with difficult co-workers, identifying what defines good team work chemistry, charming your boss, charming your underlings, etc., are all challenges better encountered in your current work environment than when you start your company (and screw it up due to lack of experience).
Jumping into the water before learning how to swim because somebody said "hey, the best way to learn how to swim is to just do it - that's how I did it!!"
The most difficult challenge for young adults inexperienced in the adult world of employment/business (corporate politics, backstabbing vendors, non-paying customers, unscrupulous business partners, etc.) is separating the noise. I believe this post (although well meaning) is "noise" that will harm more than help.