Yes and no. Short-term your insoles may be comfortable and hold up well, but long-term inserts will help restore the support and comfort that breaks down over time in your original insoles. There are plenty of different insoles that will provide varying support levels, padding, and unique features that are available at affordable prices.
You’ll want to be able to try them on with your boots so you can find an insole that fits the dimensions as well as your needs and comfort.