That sounds like bad advice. The huge impact of Heartbleed is precisely because of the monoculture in SSL/TLS implementations. Shit happens but this vulnerability is such a catastrophe because an estimated half a million of the top Internet websites have been vulnerable since 2012, including popular services that everybody is using and the vulnerability once discovered, is easy to use and far reaching, allowing one to steal sessions, passwords, the domain's private keys and anything important.
It really can't get any worse than this. At the very least we found out about it, better late than never and we can discuss the source-code, but it does make one wonder ... if SSL/TLS is such an important piece of infrastructure and if we need a monoculture (because apparently it's bad advice to reimplement crypto), why aren't we using a library that's the reference and that's peer reviewed by a standards committee, instead of relying on a library for which commits don't necessarily trigger sounds?