To understand why people are desperate for this specific link, you have to respect the science. Dr. Dispenza references the work of cardiac electrophysiology.
Learning to tune the brain and heart into a state of coherence so they can broadcast a clear electromagnetic signal. joe dispenza body electric meditation link
When you live in stress, your brain waves are scattered and incoherent (high beta waves). The meditation guides you into alpha and theta brain wave states. In these states, the different compartments of the brain begin to synchronize, communicating with high efficiency. Heart-Brain Alignment To understand why people are desperate for this