I think that this opinionated writing style is really great for product documentation, particularly when you are documenting something that is not intrinsically interesting.
As an author writing like this you are leaving yourself vulnerable. It shows that you have fuzzy, opionated and possibly irrational thinking, which is very easy to criticise. This is unlike our typical dry and academic writing where we remove ourselves and personality from our prose. I am guessing that this vulnerability is what makes you feel foolish when you write this way.
I've also been told that this style is not great for non-native speakers.