It's not all utter nonsense. Some things fall into the category of "we can't change this overnight because we have users, but it will be changing in the future".
Sure, he even acknowledges that by writing that in FreeBSD world back compat is more important than security. There's obviously nothing wrong with that as long as you're OK with this trade-off. He isn't, sucks for him then. :D And calling him OpenBSD zealot that is trolling is, well, trolling. ;)