As I've mentioned it, this risk gets very minimized in 3v3/4v4. light tanks are very valnaurable to snares & mines. Just one hit from it will make Allies loose LT for nothing It's very hard to find bypass route without detected in 3v3/4v4, so it requires catching enemy at 100% off guard to catch walking stuka. Especially when they tend to nest in the base except for the time they are shooting.
It can be happened, but very not likely.(Also note that they need to hit 2+ shots to kill walking stuka)
2 shots for a fast firing, very fast moving light vehicle is nothing. Esp with their low cost.
If they are spending so much on mines in the early phase of the game your inf will walk over them with weapon upgrades and the mines are easily countered with a single sweeper.
All Allied factions have access to engineer squad at minute 0 now. Realistically they will have 1 maybe 2 mines in predictable routes. In this phase of the game it is virtually impossible to have all approaches sealed off against a LV dive, except maybe ultra urban/Redball. Or more likely, your forces are huddled around a single AT gun trying to fend off that LV (esp T-70!) while they swamp you with inf and weapons teams + LV in combined arms. Only after the map control has stabilised and ppl dug in does it usually become more difficult to find such a route.
I've seen ppl do a dive straight down the middle on a retreating stuka on Lienne and still get it. Easily worth the suicide dive cost. A puma or even a Luchs would have swiss cheesed the thing or at the very least given them real fear. Vet I puma would give free kill.