Time Change

I am of the old school and I can remember a time when we didn't have to worry about changing our clocks back and forth. Then when they first started to do this it was about half of the year you were on fast time and the other half on slow, except for Indiana which stayed the same. Since my husband worked in Indiana and we banked in Indiana, we stayed on their time. My children and their friends got very well at telling the correct time in our crazy house.
After awhile, we got to move the days to change to the first of April and the end of October and at this time Indiana had to change and so did our house. Now we are the second week in March and the first of November for the fall back and the spring forward.
My question in all this is why do we even bother? The only thing that I can see that it does is to mess up our sleep patterns. Last year when we "fell" back, we had just gotten a new clock and I was afraid that it wouldn't automatically change like it said it would. So I laid there in bed and made sure. So much for that extra hour! I just don't understand why they don't leave it on the fast time all the time. Wouldn't that make sense?