What's the problem with doing many rolls until you have some good stats ?
I do not use ctrl+8 in BG2 because that's cheating, I just keep rolling until I have the most appropriate stats for my character.
Why willingly having good stats ?
Because this is a computer game, not a pnp game, where you DM - if he wants you to play for a longer time and do not cause frustration - will adapt the encounters to the strengths and weaknesses of your party.
For instance, in BG2, Mind Flayers can eat your intelligence 5 by 5.
You'd better at least have 11 intelligence if you want to survive two hits.
In BG, encounters are fixed and cannot be changed.
There are mods to increase difficulty.
You are free to use average stats for your characters.
Hey guys, why don't you cut yourself one arm and try to swim ?
And wait, cut both arms.
Why not adding sharks in the water ? (with both of your arms bleeding you'd better swim quickly before the catch you).
This should be harder that way... And so fun ;-)