First, I think all roller coasters are a thing of beauty. I love seeing track. Nothing makes me happier. I marvel at them.
Second, Roller Coasters are extremely popular. Always. It will be a draw for the general public.
Third, if this is indeed a bare roller coaster it still completely fits with the Jurassic Park theme. An animal park that builds a coaster to boost attendance is well within the story line.
Forth, Not everything needs painted concrete and robots to make it good.