This is not a "basically stock" corolla. It's actually a really cool car with a fun story behind its design. Toyota's then-CEO Akio Toyoda is a big car nerd and an accomplished race car driver. The GR Corolla was his dream car. He was directly involved in the design and development of the car, and personally took the prototypes to the track for test drives to provide feedback to the engineering team.
It's ok that this is not your thing, but please do not be condescending towards other people's hobbies.
Corolla.
And I suspect Toyota put a little more effort than that into the GR.