Many practitioners have misunderstood bodhicitta mind, they thought having kind heart and kind thoughts are considered as bodhicitta mind. Do take note that, having kind heart and kind thoughts are indeed good, being a good person doing good deeds in the human realm, can hardly arouse afflictions too, but it doesn't relief suffering.
Kind heart & kind thoughts can cultivate some blessings, form good affinities, which are definitely beneficial in the process of human life, but that's after all worldly (mundane dharma), not transcending-world (supramundane dharma), it can therefore, reduce some afflictions but not eliminating suffering.
The fundamental of dharma is to transcend life and death, eliminate affliction. However, to transcend life and death, eliminate affliction, it's not enough to use kind heart, therefore we must arouse the bodhicitta mind.