I'd go so far as to say weight is only particularly important (in itself) for health when you're very overweight or very underweight.
If you're average... a little thin or a little chubby then it starts taking a back seat to other things.
If you're prediabetic I actually find myself concerned for you when it comes to eating habits, binging and starving the way you do with no exercise can't be good for the long term. Weight in itself doesn't take into account activity levels / type of activity or body type, amongst other things.