Who knows? I think Bethesda actually screwed up the BoS pretty bad. In the originals, the BoS were exactly like the Outcasts: gathering technology to allow civilization as a whole to evolve.
Actually, the BoS gathering tech had/has nothing to do with helping the wasteland as a whole, they gathered it to make themselves stronger, and 'keep it from falling into the wrong hands'. Funny thing is, anyone but the BoS is considered the wrong hands to them.
In FO1 and 2, the PC only got involved with the BoS because the BoS thought (and rightfully so) the PC could accomplish tasks they would have to send a whole squad or even platoon out to do. To the BoS, the Vault Dweller and The Chosen One were nothing but tools, very useful tools, but tools to get the job done, none the less. Just think about in FO1 when you had to go to the Glow just to get access to the BoS base. They send you because they just want to get rid of you, the place was a radiation death trap. When you come back, they're true to thier word, but they seem more surprised that you survived than anything else.