«As low»? Why is that important? Looking at some of the best CBs in the world, they are relatively low on a stat like tackles, interceptions, clearences and headers. Rio was too. Several poor and very average defenders comes out high compared to players like Varane and VvD.Combine the tackles, interceptions, clearances, headers, even the "recoveries" even though it just means getting a ball nobody is in control of so its not actually defending anything.
That should tell you something about the relevance of such a stat. It means zero, zit, nada about the quality of the defender. It is just something that you can measure. It can tell you alot about style, but very little about quality.