There are more aspects to think about. Higher frequency not always means more power consumption. We have a powerful device, but the UI also needs more power then some people thinks. The lower frequencies are used, if you don't touch your screen. If you touch the screen, the min_freq will be locked at 1267mhz for a second. But it can scale above. I've tested a touch boost of 1036mhz and there were stutters and lags overall. I don't want to make such a compromise in smoothness. If I want lags, I can use the Galaxy S2 from my mother 
Some theory for you. To have a touch boost have more advantages, like:
1. Smooth UI and overall performance, because unnecessarily "up and down scaling" is reduced.
2. Because unnecessarily "up and down" scaling is reduced, you have less frequency scaling = lesser battery consumption, because it have lesser calculations and scalings, which both cost battery.
The fact that we use 1267mhz more often, can increase battery consumption, but maybe you'll have more battery in the end, because of the above stated advantages from it 
hells