No, chibi, it's not that one's bad or the other good. Most feminist thinkers, especially these days, live reasonably comfortable lives. They have choices. They are, naturally, the people who have the luxury of choosing to explore social & political issues. They have the resources to campaign, to seek political hearing and to network.
Less well-off women might be working two jobs, living in conditions of great hardship and in dangerous circumstances. The immediacy of their problems leaves few resources for social & political networking, research, etc. I'd argue that the poor woman is in more urgent need of feminist support. But the wealthier sector has the louder voice.
The 'comfortable' women who give feminism its voice often have no real idea of what life is like in poverty. The poor woman, therefore, feels the feminist isn't speaking to - or for - her.
Someone will be along to trash my post in a minute, so I'll say this is MY take on it. Nobody else's.