If I go around bragging about my awesome self-built home design for years, and then buy, clear and level a plot of land, while it is a necessary step, it is also largely irrelevant to my ability to actually build the house, much less the quality of the finished building.
Building the actual reactor is the challenging bit.
You claimed that building the non-nuclear parts of the construction as evidence that the reactor itself will successfully be built, which is nonsense. That someone builds a launchpad tells you nothing about their ability to build and successfully launch rockets
As far as I can tell, in its 20 years of existence, TerraPower has not built a reactor. nor had one of its designs built by someone else.