2. If you're spending your nights shipping code, then you can probably get users/customers. If you can get users/customers, getting warm intros is pretty easy. So much so, that VCs will come after you (see the WhatsApp/Sequoia story)
3. I've struggled to get funding so I can empathize with the author (among his other various random rants) but this isn't the right way to react to it.
4. VCs often say (at least in SV) their biggest mistakes are the "investments they didn't make". I know very few who said "shucks, wish I woulda have gotten a warm intro from them".
The reality is pretty simple - show growth and you'll get VC intros. If you spend your time complaining how the system is unfit for you, then building a venture-based tech company is probably not for you.