But that doesn’t address my issues: Lack of testing and apparent lack of similar care to precision and fail-safety in the design of the Lunar Module versus similar Earth rocketry (regardless of scale).
Can’t really say “regardless of scale” where rocketry is concerned.
You do realize that Eagle was LM-5. Spider (LM-3) and Snoopy (LM-4) were previously tested; Snoopy was tested operationally (descent stage landed, while ascent stage separated around 14km above the lunar surface and is still out there in solar orbit).
Testing must also balance cost. These spaceflight/operational tests are extremely expensive missions, so you’re not going the see the type of testing you’d see in something like say an automobile or an airplane. BTW, what products do you perform validation engineering on? NASA determined that 4 progressively complicated tests were sufficient, and they even cancelled 1 of them (LM-2) because schedule was also a priority. Even back in the early days of NASA, cost and schedule were king - although they weren’t as seemingly lax with safety as they seem to be these days (but they say they’re all about safety).
The Surveyor program tested the feasability of a “soft” lunar landing. It was designed with an impact trajectory. “Crashing” isn’t a necessarily bad thing in testing, as you learn more about limitations or have opportunities to identify design flaws. Also, Apollo used a Lunar Orbit Rendezvous. These are two totally different trajectories, but Apollo did build upon the successes of the Surveyor program.
Surveyor 2 failed due to an error in the insertion point and a vernier engine failure during a midcourse correction. Surveyor 4 lost radio contact about 2.5 minutes prior to landing. Belief is that a solid fuel retro rocket may have exploded either during or shortly after the radio failure. Neither of these failures point to a “soft” landing as not being feasable.
Apollo was hardly “perfect”. Apollo 1 was a disaster that cost the lives of three astronauts. Apollo 6 didn’t perform well, but NASA was able to identify vibration fixes and man-rated the vehicle. Apollo 11 had navigation errors and computer alarms that were corrected. Apollo 12 had 2 lightning strikes. Apollo 14 had two docking failures, faulty LM abort switch, and a delayed radar landing acquisition. Apollo 13 was also a failure, and took an amazing effort to save the lives of the three astronauts on board. Apollo 16 had a malfunction in a backup CSM yaw gimble servo loop and a malfunction in the LM ascent stage de-orbit.
As for testing, each flight component was rigorously tested prior to flight. NASA is well known for pushing for double and triple redundancy of components, something that drives the costs up. In fact, the amount of testing done for the Apollo program was well above the level of testing performed by current rocket programs.
As for animal testing, that was done to see whether or not the radiation would kill people.