I agree. And i think it is so much easier said than done sometimes. However, with regards to the kid, I don't think it might be so extreme to choose between a zero cost napkin and a $1 diaper. That being said, I feel that not everything should be focused on the price tag. Perhaps the time saved from regularly cleaning up the napkin might improve the quality of your life.
Let's say that for example, if you have a kid, you might already be stressed from taking care of the kid. A diaper provides convenience as you can just dispose the diaper after it is soiled as compared to having to wash the napkin.
So therefore, I feel that for an approach, one should look at the big picture, take what is useful and use it to apply it in different aspects of life. This question can be highly debated/discussed. Just decide and choose the option that appeals to you most.
Umm , I agree with you saying that we shouldn't show off unnecessary but there is unique s of this question.
This is a good example wants versus needs. We know the diaper are going to cost a lot of money but it is a need. The price is up to debate to see what is worth it but at the end of the day we still need diapers for our kids