Does Hinduism have something that Buddhism lacks?
Some people are able to meditate, they can focus on the breath, be aware of sensations and thoughts etc. etc. Others, otoh, find it impossible to even sit down for a minute. Their minds race along various issues, never quiet enough to observe anything.
The Hindu will say this is karma, each individual carries certain impressions from his past births, which is why they face different problems, their minds respond differently, and so forth. So according to the Hindu, you ought to reduce as much karma as you can (with good deeds, chanting mantras, devotion etc.) before you can even think of meditation. Else, your mind will be restless and meditation a waste of time. The Buddhist, otoh, will say just meditate, keep trying over and over and over.