Namaste Savitri,
Although the science of yoga is widely misused by individuals looking to make a name for themselves and profit materially, yoga itself is certainly not to blame. Yoga is not about acquiring siddhis or manipulating people. It is about 'joining' oneself to God, reforming one's body and mind to reflect Divine Wisdom.
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Namaste,
Shishya
ॐ
ॐ सह नावतु । सह तौ भुनक्तु । सह वीर्यं करवावहै । तेजस्वि नावधीतमस्तु मा विद्विषावहै ॥
"Together may we be protected. Together may we be profited. Together may we do a hero's work. May we learn intelligently. May we never hate one another."
-Brihadaranyaka & Taittiriya Upanishads