The goal of the program is to figure out what does and doesn’t work.
There are numerous zero single failure points all over the ship currently as they figure things out.
Using the concrete was a way to test if they could set up a launch pad easier. ALL their tests and modeling proved it should work.
Tests and modeling aren’t the end all be all though and sometimes things you don’t or can’t anticipate happen and then you remodel with the new info. This isn’t a high school project, it’s rocket science.
There was nothing bullshit about testing it out.
The goal of IFT1 was don’t blow up the entire stage 0. They didn’t blow up the entire stage 0. They learned the concrete doesn’t work, but also hopefully they were able to learn WHY. And if they found a why that why may lead to it being attempted again in the future maybe even by someone else.