To a degree, I understand when people do it when speaking. It can easily be a bad habit, it can slip, it can be your age and the influences around you.
When it comes to doing it in a written blog post that you hope other people will read? Boggles the the mind.
Using swearing for emphasis is a non-event where I am. You'll find it equally in documentation as in conversation. There is no taboo around it. It isn't considered to be some "bad habit".
We're two decades removed from "Where the bloody hell are you?" [0] You won't find many people reacting to swearing over here as if it's unprofessional. It's just another emphatic.
When it comes to doing it in a written blog post that you hope other people will read? Boggles the the mind.