Trying to stand on the brakes at full power doesn't always work very well. It's also hard on the props and requires more concentration than just a high speed taxi down a runway.
A few weeks ago, I went with a friend to check out a 414 that had been sitting for a few weeks. We did a high speed taxi to make sure both engines were making full power. We found out the left engine's turbo was seized, and the right engine's fuel flow read way high. This was very easy and safe to check with two pilots on a 6800 ft runway, it would've been less so at a run-up pad.
Years ago, before I had my multi rating (but owned my Aztec), I washed it. I think that was the only time I washed it, actually, but I did a high speed taxi to dry it off instead of once around the pattern since I was not legal to go around the pattern solo, and my instructor was not available.
In the case of the OP, no, there's nothing wrong with doing a high speed taxi. Flight occurs if the plane leaves the ground.