I’m trying to understand solid rocket motor grain design, and I had a question about BATES grains.

From what I’ve learned, BATES grains are usually designed to burn in a controlled way to keep thrust progressive. But what happens if you use multiple grains without inhibition it will give a neutral burn.

For this to be achieved, is it safe to have multiple grains without inhibition? What could be the possible safety issues that might come up?