But unfortunately open source is not written by professionals, but ideologically driven amateurs and other random hobbyists.
That's not a fair generalization. Though there are plenty of "ideologically driven amateurs" — especially in the Linux (compared to BSD) world — they are mostly found among the noisy advocates, rather than actual developers.
Especially since a Dr Stephen Henson and the IETF member and security professional Robin Seggelmann submitted the bug, their CV:s are as professional as it gets. So please get real...
Coding is easy; All you do is sit staring at a terminal until the drops of blood form on your forehead.