Why would you want to cast powerful love spells?
And could you even do this in practice? There is no need to diverge towards complexity but a good case for motivating such desires could be influenced by affirmative beliefs based on cultural affiliations and/or religious practices being carried out based on belief and moral obligation. This may surprise some non-believers but pretty much all world religions believe in the power of love. Established and ancient religions have reams of passages available in print, and even online, from the wise sayings dictated by its prophets.
A great number of these prophets have achieved god-like or deity status so much so that their followers or believers have come to love them ardently to the degree that love becomes falsified and the passion from these cult-like or fundamental practices does harm to others who see their world differently. The world of the Wicca remains widely unknown and mysterious. There is much that interested readers, particularly those that are interested in humanistic and natural love, can learn from material available in print and online.
The world of the Wicca devotee is heavily influenced by love, or at least the willingness to dispense love and experience it. Sages have by necessity commercialized many of their methods but no harm is done in the process. The true Wicca sage is not ever malevolent and is an out and out devotee of peace, love and harmony. That’s why there is always a willingness to cast powerful love spells on behalf of devotees or clients.
Not all the work is being done by the witch, mind you. Because these practices are essentially religious and spiritual in nature, the devotee or client needs to affirmatively believe that these spells will work the necessary magic.