Not necessarily, the Late War Germans still had a great many defensive emplacements, like FlaK towers and FlaK defenses just about everywhere. FlaK hit aircraft a lot and air losses were pretty heavy.
Air losses declined considerably over the latter course of the war. The greatest threat to both low and high altitude aircraft was enemy aircraft, which was almost non-existent by late '44 and disappeared by '45. (There was a running joke in the Wehrmacht that went something like: "If it's camouflage it's RAF, If it's silver it's USAAF, and if it's invisible it's ours.")
Flak towers were built in cities and I don't think you can consider them very mobile.
Their utility at defending ground troops from ground attack is practically non-existent.
The biggest risk to a pilot from ground attack actually had more to do with how many planes attacked one target. "Tail end Charlie", the last guy of eight or sixteen, would catch the most flak. But even they often survived.