The fitrah has the potential for both. ‘Imma Shakirun Wa Imma Kafoora.’ (Whether you chosse to be grateful or whether you choose to disbelieve. This potential is not found in trees or the sky, let alone a toy car. Its how you shape it using your faculties and the revealed knowledge by God.
This is what Surah at Tin is about. By believing in the unseen and Amal Saleh you can reach the climax of your self. Which is evident in the personalities of Messengers like Nuh, Isa, Musa, Muhammad (saw) and all other believers who believed like them.
Or you can reduce yourself to cattle. Completely ignorant of your surroundings.
This sensitisation and desensisation all comes down to one sole reason – the love for this life. If one uses their intellect to look beyond the apparent of things one can overcome or rather prevent themselves from this desensitisation. This is the test.