Actually in the modern world the mind is already assailed by far more impulses than ever before, a few hundred years ago people would live without technology in forests and natural environments and would have basic peace of mind just about permanently.
To achieve goals also you do not need to overwhelm your mind whatsoever, even just a single thought you can take it to fulfil you and bring you success. But to empower a thought you want to have mental energy and not drain yourself too much. Keeping the mind agile and fortified with energy is the key to mental health and balance.
Once your mind gets into states of stress and strain over a long time anxiety, anguish, overthinking, depression, imbalance in neurotransmitters etc etc etc will all come
Leave any individual in a forest area in the mountains for 3 months without any input he will suddenly process his last 10 years and after this attain to a state of clarity and peace never experienced before. However since the container never gets emptied it is just constantly overwhelmed.
Meditation for sure helps with this but in regards to processing subliminal information perhaps it is best to add some info then directly process it and avoid stuffing your mind too much with unused information.