The world around us is noise. Noise that is sound, but also noise for each of the other senses too. There is too much to see, to say and to taste, to touch, to smell. It is exhausting.
To truly be tranquil, you need to find a solitary space where your senses can rest. You do not need to live there. Indeed, you would go insane if you were under-stimulated as much as you will when over-stimulated. But without a space, physical and mental, to retreat to in solitude, you also have no place to rest up and recharge.
The sages among us have the ability to carry their solitude with them. This is a good goal, that you do not need to retreat into your home to find that space but that you can carry it with you to have it there whenever it may be needed.