Its just a losing gambit. You know how many shopping bags we have around the house? Supposed to save energy, but once you have 4 or 5 of them, you're up to a lifetime supply of plastic bags. And I'm sure we're not the only once.
This 'issue' is eco-theatre, in my view.
It’s not “eco-theater” to want to reduce the ecological cost of bags, though. Not is it “eco-theater” to want to keep millions of plastic bags out of the oceans and rivers, or out of storm drains where they cause clogs, or out of bushes and trees where they are just ugly.
And as I alluded to above, not all bags of the same material are made equal. The original British source has a range of 80-250g for cotton bags. The ones I use weigh in at less than 50g.