He also talks in past tense, states that before all of this if you left the wood you were a Viera no longer. Times have changed however and that's no longer the case. It also states that a Viera can seek the aid of outsiders if the forest/their people are in danger. The men leave not because they want to but out of necessity. They are the first line of defence and most of the time, the last.
You don't go into those woods looking for a male Viera - I think that's just him adding in 'drama'. Fact is if you go into those woods you're probably going to die unless you are escorted by a Viera or have their blessing.
I really don't understand why people are getting confused about the 'They do not exist to us' part. It's an old saying of course and not what we use today. But it's how someone describes an object/person/place that is known to exist by hearsay but hasn't been seen by any outsiders; and if they have, they haven't survived to relay the tale.
Example; a tribe on an island that hasn't been inhabited by the modern world. They have customs and their own religion. We will never make contact with them and only a handful will see them. We know they exist by hearsay, secondhand experience and obvious physical evidence. But, they're not on our radar, they are air and only matter to those who actually go and seek them out. Those who do try to seek them out end up attacked and killed.
This is a true scenario btw, there's a place like this - forgot the islands name though. Give it a google.
Let's switch back to Viera; you can see the similarities. Hearsay is the females talking about them; secondhand experience is the females again. The evidence is the young kits and the corpses of the fools that tried to cause the jungle/wood harm and were killed.
Now let's break it down.
Lore states they exist; he goes on to say they exist.
He then goes 'they do not exist to us'
It's either one or the other buddy, there is no in-between. Dramaturge is just being dramatic, hence his title. Either that or he's drunk.