Styling text in Microsoft Word is one of those things that it pays to do correctly. And if you get to use software the way it was designed to be used, instead of fighting the software to impose your own personal workflow, you’ll have an even easier time. This goes double for work that you need to share with other people, or workflows that need to be compatible across a company.
But for things you do frequently, finding the most efficient and effective method is worthwhile.
Optimizing performance for a monthly task is generally a overall time loss. And for things that you only do once in a while, inefficiency is fine.