It wasn't an argument against Modi. It was, as you said an argument considering the system of governance presently being followed and the only one that will be available to Mr.Modi if he were to become PM. However, to quickly disabuse you of any notion that a Presidential form is necessarily better, the country of your present residence is a good example. The system of checks & balances can sometimes end up being used cynically by politicians to oppose a leader, an ideology or simply be destructive. That is the world we live in, it won't make that much of a difference who becomes the PM as many of you seem to think. Improving on MMS won't be as easy as you think. That is simply the nature of the politics at play in India.