Your idea is 100% true and everyone will agree with your idea. If the Indian team management had given importance to the team selection and chosen to bowl on the Ahmedabad pitch, they might not have performed so badly that day. Rahul Dravid's team selection was not wrong, but they should have considered the spin on the pitch that day. Only Virat Kohli, Rohit Sharma, and KL Rahul's contribution was noticeable that day but others contribution fully zero.
I am not sure whether Rahul Dravid was given 100% freedom in team selection. I was not very happy with the way Mohammed Shami was left out of the first couple of matches, and also the way they treated Ravichandran Ashwin. The current selection criteria hasn't worked well, as we have seen from the failure of the Indian team during world cup finals. I would suggest providing complete freedom to Dravid, at least for the next 12 months, and also some of the senior players (especially guys such as KL Rahul) needs to be rested and replaced with younger players.
I personally think Rahul Dravid may not be given full freedom. India did not get the expected performance from Suryakumar. Even then he was given a chance. I thought the Indian management would give Ashwin a chance in the last match. Because the pitch was spin bowling friendly. An extra spinner would have been more helpful for India. At the same time, Ashwin bats quite well. But when I didn't see Ashwin in the final square, I was disappointed. Suryakumar Yadav's batting was also not as good as expected. Yadav has been included in the squad for batting well at crucial moments for the team. But he failed completely.