I sympathise with the frustration of the HP rolling system sometimes. It is however a hard coded aspect of NWN. As Tailr said, the choices are between maximum for everyone, or random.
A middle-of-the-road average system would be fine from my personal perspective, but it's just seemingly not possible to implement. So of the two systems we have to choose from, we've chosen randomness.
It can really suck sometimes if you get entirely too unlucky and end up substantially below the average (though this isn't as common as you might think). There are many ways you could attempt to roleplay that frailty in-game though. Old war wounds, or the result of various traumas, etc. If it's something you do well, it's entirely possible a DM might take notice of it and give you something to even the playing field a bit.
A middle-of-the-road average system would be fine from my personal perspective, but it's just seemingly not possible to implement. So of the two systems we have to choose from, we've chosen randomness.
It can really suck sometimes if you get entirely too unlucky and end up substantially below the average (though this isn't as common as you might think). There are many ways you could attempt to roleplay that frailty in-game though. Old war wounds, or the result of various traumas, etc. If it's something you do well, it's entirely possible a DM might take notice of it and give you something to even the playing field a bit.