If you drink the average every day, you will spend a large part of your days inebriated. And if you don't drink the average every day, you will be deeply drunk every few days.
It's completely unreasonable to call that level of consumption "light".
1 beer is not going to make anybody inebriated for a large part of their day. 3-4 beers will put someone into a good buzz but most will not be “deeply drunk” from that.
And again, this is the UPPER BOUND. not the average as you say
i'd really like to know where all of these people that can't seem to handle a glass of beer, quite probably with something to eat, without freaking out are coming from?