You obviously have no kids. In order to feed your children breast milk from a bottle, you need to pump it. This introduces a few problems:
When pumping if both hands are being used (one for each breast), then you absolutely cannot cover yourself.
If only using one hand, then it takes twice as long (pumping already takes 15 minutes on industrial strength pumpers.
Then you have the little problem of storing it. Breast milk must be kept chilled or it goes bad quickly. Plus it gets heavy and bulky if you are transporting meals of it.
Plus your body only produces enough milk for the need. So if you pump and breast feed, then you will produce too much and mom will get engorged and swollen.
On top of all of this young children get nipple confusion and cannot easily switch between breast and bottle. Even if there isn't confusion, bottles are easier to use and therefore, children can get lazy and refuse to go back to breast if they are given a bottle.
For these and other reasons, women who want to breast feed usually stear clear of bottles.
