Writers have a responsibility to ensure that they take reasonable steps to ensure the accuracy of their statements, and that those statements are clear.
The alternative of doing so is to state that public writing is of no consequence and that writers should be held unaccountable for their own actions.
This is obviously in contrast to the popular opinion, and for good reason: if you cannot disagree with a piece of writing, it limits your ability to engage with it.
Therefore, because his examples of alienation (to borrow your term) are incomplete, OPs omissions are an issue. While its true it conveys his base point (he's alone), it is difficult to answer any helpful questions around the point.
Examples of questions we can't answer: does the world need to change or him? Why? Would that help? If he isn't bothered by the state if affairs, why the melancholic tone? Is there more to the story? What initiated this isolation?
Regarding the 'sharing what one is comfortable sharing' - I would normally agree, but again, the tone makes me think a point resides somewhere. Therefore I think that's not the core issue.