If I had allocated a little more time when recording I would have talked more about this (I may come back to it in the next episode), but the bottom line is they sort of thrust this information on you with no context at all. Besides for self preservation, who the hell says HE has to be the one to go in there and stop it? There are plenty more qualified people on Earth to handle it, plus it's assuming they know everything that's happening globally. The way I see it Freeman would rather take his chance on Earth than trust these clowns to teleport him to another part of the galaxy. This comes back down to Half-Life's story presentation, they give you the absolute bare minimum and you're just supposed to go along with it. I think a lot of people remember details that are plugged in later from HL2 or online supplements, when the game gives you almost nothing and you only have one option anyway. As for the teleportation rant, not every line is meant to be a laugh out loud event, there's always a bunch of space to fill and I try to mix it up with thoughts that might be interesting to follow.
The thing is, the scientists (who should know what they're talking about, given their department) outright told him that if HE doesn't go there, there wouldn't be much to come home to. Meaning that not only is Earth fucked if the portals stay open, but no one else in the area is qualified enough to go to Xen, using their only Xen teleporter Which should be obvious, as there's like three guys in the Lambda Complex, none of which are as heavily armed or adept in combat as him. Everyone else has been killed by aliens, and all the doors are sealed. It doesn't really require knowledge of HL2 or the Laidlaw vault to recognize any of these things. At the very least, he should recognize that maybe millions of soldier aliens showing up in the middle of the United States along with highly deadly wildlife teleporting all over the Earth would be very bad. The aliens apparently teleport at will, so who's to say that he won't make it to New England only to have a Garg dropped on his head?
And why wouldn't he trust these clowns to teleport him to Xen? He apparently trusted them enough to let them teleport him to the other side of the continent. This is despite the fact that he almost never trusts anybody, has repeatedly called all of Black Mesa incompetent, and never even got a response from the scientists who just told him that they'd teleport him to Xen. There's no real reason for him to think they'll follow through.
Why would Freeman care about killing the alien and saving the world? He doesn't care, he just want to get the fuck out of Black Mesa, and he cant care about these stupid scientists mumbling around about portals and shit either.
I think you are overthinking this to much.
