Blogging for oneself, with no concern for others - is that the right approach?

This post is in response to a recent one I saw on a Hindi blog in which the blogger says that her blog contains whatever she feels like, and no offence may be taken if her writing hurts anybody's feelings. She goes on to advocate that one's own satisfaction should be the best measure of what should be written on personal blogs.

We should write from the heart: for ourselves and for others, isn't it? 

Let us start with creative part of the proposition, and recall what established authors have been recommending about literary writing: Write in a way that satisfies your own self. Only then can you put your best into it.
... and how top journalists often add something like this: Write with the reader in mind. Put yourself in the reader's shoes. What does he want to read? How does he think? How will he accept your writing or respond to it? Only then can your copy be effective.
There is no marked difference in both these sets of propositions. I feel that the first one should not be interpreted as ignoring the reader or caring a hoot for others' feelings. The first one wants you to be a perfectionist while the second advice wants your writing to be effective. When read together, they produce perhaps the best writing advice: Put both your heart and mind to your writing; give it all the  force that comes from the best expressions and that comes from shaping it with the tools of the writing craft.
The first point perhaps talks about the emotional and talent part of writing. I have no authority on the ingredients that lead to writing that shakes people's minds: the knack of writing good prose, using apt and forceful expressions, ability to imagine and dream plots, putting the imagination on paper, and so on. Not many are borne with this talent and not many can inculcate it in themselves through training. I am one of those who cannot write too well and so must close the 'writing from the heart' part of the discussion here.
However, what we all can do is to use the craft well. We can ensure that we write standard language. We can ensure to make the prose free from grammatical and proof errors. We can avoid inappropriate language. We can commit not to copy-paste others' prose. If we are not proficient in English, we can decide to revert to our mother tongue, or get the final prose edited by someone else if English is so important.

blogging for money or personal blog

Writing for oneself and forgetting the reader?

That seems arrogant and unprofessional, even for a personal blog. A blogs is a public space on the web [unless we have restricted its viewership] and whatever we write here is for public consumption. We also cannot afford to ignore the  society. Writing in vacuum can be good for a private blog or a personal diary, not for a blog.

Blogging cannot be irresponsible

Though the blogger mentioned here may not be indiscreet in her writing or posting visual content, but her message smells of indiscretion, isn't it?
As bloggers, we must not write what could hurt others's sentiments, support anti-social and criminal ideas, or copy-paste others' content. We must scrupulously follow national laws and universal canons of ethics. 
A blogger can take creative liberties, but with responsibility. Agree?