That would be because there is no real choice. Pakistan is not a viable choice. Pipelines in any case are not absolutely necessary on any urgent basis. Not at this oil price.
India's objection to CEPC is both about alignment & China own position on any Indian activity in the S.China sea. China says that the area is disputed & therefore it is not correct for India to get involved, India uses the same point for this project.
I really don't know why you guys take CPEC as some sort of attack on India itself.
We simply took the most efficient route. In fact, the only land route.
This is not aimed at India, we have MUCH bigger plans in mind. We are linking up the entire Eurasian heartland with the New Silk Road, we are building up an alternate international system with institutions like the AIIB and the SCO. This is one part of a very big chain.
OK I get that India and Pakistan don't get along. Just a few days ago there was a mass of indiscriminate artillery fire, that killed scores of civilians on both sides. This is not news, it happens all the time. A while back, there was news of soldiers being beheaded and their bodies mutilated on those same borders. The bloodshed is a constant.
Trade between India and Pakistan is nearly non-existent for two countries with such a long border. Much of the economic activity is due to smuggling, which leads to problems (drug problems in Punjab and all that).
Now look at China and Japan. Everyone knows what happened in WW2, it was the bloodiest conflict in all of human history. Or look at Britain and Germany.
Now... when was the last time there was any cross-border bloodshed between China and Japan, or Britain and Germany? In fact they are all now each others largest trading partners. The exact opposite of the India-Pakistan scenario, in which there is little trade, and a vast amount of cross-border bloodshed on a weekly basis. (Not to forget that fact that the India-Pakistan border is the most likely place for nuclear war in the whole world).
We have big plans... and they are all to do with increasing China's economic connectivity with the world. It's not a conspiracy against India, it never was.
But of course, if you are always looking for an enemy, you are bound to find one. It's happened before and can surely happen again.