Hmm, "not invented", that is right.
But they may have used it ... think of all the drunk birds you can see.
Fermented berries can have up to 6.2% ethanol. Eat 1 kg of fermented berries with approximately 5% ethanol and you get 50 grams ethanol (which corresponds to 4/5 of a bottle of wine).
Consider that the guys were mych smaller than we are (length of approx 145 - 155 cm, bodymass 45 - 50 kg); 50 kg bodymass equals approximately 29 kg of body water (in which the etahnol dissolves), which gives a blood ethanol concentration of approx 0,15 percent (if you eat all the berries in one shot, i.e. in less than one hour).
You may get quite inebriated with 0,12 - 0,15% BAC - especially if you have no tolerance ...
So your contention does not hold water 😉 and the Cro Magnon (?) and Neanderthals may have cohabitated in the same area. 😉