If these bulbs would really save people money and they were as good, why are they mandated?

Either these bulbs aren't as good at producing light or they aren't cheaper or some combination of the two. But it they really were so unambiguously better, why are people having to be forced to buy the new bulbs?

Californians can start saying goodbye to traditional 100-watt incandescent light bulbs now that the state has become the first in the country to require a new standard for the screw-base bulbs.
Experts say the new rules, which took effect New Year's Day, will save residents money and energy. California is already the nation's leader in energy efficiency standards.
As of Saturday, what used to be a 100-watt light bulb manufactured and sold in California will have to use 72 watts or less. The 72-watt replacement bulb, also called an energy saving halogen light, will provide the same amount of light, called lumens, for lower energy cost.
Similar new standards for traditional 75-watt, 60-watt and 40-watt incandescent bulbs will go into effect in California over the next few years, with wattages reduced to 53, 43 and 29 respectively.
The new rule does not ban incandescent light bulbs; it just requires those bulbs to be 25 to 30 percent more efficient. And it only affects incandescent light bulbs manufactured after 2011, not light bulbs already in use or on store shelves. . . .