Is it Worth It?
That has to be your call.
If there's just you, then having a professionally designed template - and I'm necessarily not talking about how the template looks - I'm talking functionality-wise, it will save you time.
It'll also mean your material is consistent, looks professional, and is a reflection of how you should want your business to be viewed.
If you're an organisation with a team of people who use Word, then yes, it'll do all of the above (and more). Plus, given you have multiple users, the time savings will be multiplied.
If your documents are complicated, then I'd recommend video training as well (see What Do You Cover In Your Video Training).
Please note: if you're unsure about whether I can help, get in touch, I'm more than happy to have an informal chat.