You are likely correct, and statistics might show it.
But another category which comes to mind is air-attacks, by both ground assault aircraft -- i.e., P-41 Thunderbolt -- and strategic bombers.
Here I'm thinking about the break-out from Normandy, where the Allies finally grew tired of fritzing around with the Germans, and brought in their heavy bombers.
The result was, many Americans including a general, killed by our own bombers, but also the destruction of German opposition in front of Patton's army.
And how many German tanks were destroyed by aircraft, soon after, in the Falaise pocket?

During a WWII artillery or mortar barrage the safest place to be was probably inside a Panzer.