Why is it so hard for so many people to say "no"?

To bosses, friends, relatives, husbands, wives, children? That's because many people don't have solid goals. And, as a consequence, no clear set of priorities. They are being tossed by the waves of life, and the days just come and go. That's why they are such easy prey for those who are ready to devour their time, attention and energy. After all, it’s they who don't manage all these life resources so only THEY'RE RESPONSIBLE for this fault, not anyone else. It's absolutely not about they're afraid to offend someone or make a poor showing. They just don't manage their lives, so there are those who take this matter into their own hands.