Some people put a bunch of sentences in one paragraph. Others like to separate their writing a bit more and would write the same thing in 2 or 3 paragraphs. Some people use a lot of abbreviations, while others like to spell out everything they say. Some people don't capitalize their sentences, others like to use a lot of italics to highlight the stress of a sentence. Some use contractions like "I'm", some do not.

These kind of things make the writing style more individual and personal and give each user a sort of own "voice". They are not grammatical or spelling errors that make questions harder to read. Why, then, do people feel the need to edit posts to meet the editor's own criteria for what's standard and "professional"? I understand that Stack Exchange is supposed to be a source of objective knowledge and a resource to use for many years. But must we kill all individuality in the process?