Is IIIT Allahabad a one-dimensional institute where people are just too enthusiastic about coding?

No, Not at all. The environment of coding at IIIT Allahabad is highly intense because there are a lot of those students who are really fond of coding. But apart from that, there are a lot of those students who are also preparing for other competitive exams as well like CAT/ MAT/GMAT/GRE. Hence, one cannot say in the generalization that IIIT - Allahabad is for coding-lovers only. 

A larger number of alumni from IIIT-Allahabad are in major universities like Stanford University, Carnegie Mellon University which is the best in Computer Science and Research Studies, which proves the above statement. To summarize all this, there are a lot of people who come to the institute because they have that intense zeal of learning coding and they do it very well while there are some other students as well who follow their own passion amid the peer competition and highly pressurized learning environment.