Happiness index

Why this article is misleading?

The happiness index is very subjective and even then, India is 62nd on the list. Bhutan, Nepal, Sri Lanka and Bangladesh all are higher than India. Of course much has been written on happiness but three clear problems with this measure are that it is non-comparable across individuals (let alone countries) - as happiness as a concept may be different for different people and secondly, even for an individual, happiness can be different at different times of the year. Third, the Hawthorne effect (how people respond in front of a surveyor) is different for people from different countries.