Well written and thought out post on value of solitude.
In my view, and I have had to engage with solitude by default for the last 6 years, I think it is important to realize solitude is not cessation of activity. Rather, when we are alone and apply ourselves to the things we love — careers, who we are, hobbies etc. — absence of relationship noise and activities sharpen our focus, sharpen our minds, bringing to fore new ideas, new directions, helping us arrive at new in perhaps every dimension of life.
When we are alone but not lonely, we remain busy, active, and productive. It is loneliness which leads to cessation of meaningful activities.