In the mid-80's I'd routinely fly a puddle-jumper prop-job regional airline from Blue Bell PA to Philly Int'l airport. They'd weigh passengers on an old time industrial scale with a giant dial. Women would freak-out since everyone in line could see their weight.
There is a lot of focus on the weight of the aircraft including the amount of fuel on board.
The cargo is weighed.
I'm fine with them getting a good handle on something that they have just been guessing at up to this point.
I'd rather them determine the weight, than find out they missed it when the aircraft doesn't fly as expected.
It can also lead to better fuel consumption as they can better understand the expected load, and the amount of fuel required so they aren't taking on too much. Whether the Airlines pass those savings to the consumer is another question, but regardless, less fuel burned is a good thing as airlines do contribute significantly to pollution.