Doesn’t Sherman’s rocket launcher, lacking an explosion-proof module, make it a bit over the top?

I noticed this while playing: when I was driving a Western‑style Tiger and used high‑explosive shells to hit that thing’s rocket launcher, well—no secondary explosion occurred; it only damaged the launch mechanism, rendering it unable to fire for a while. But once it was repaired, it just kept lobbing rockets at me as usual. I quickly added a secondary‑explosion‑trigger module to it—otherwise, it’s just too annoying.