What you say is correct. But India might being weaker in all aspect might still made use of this tactic... To quickly hurt the Chinese forces and hopefully making the lost unacceptable for the Chinese, so much so that the Chinese would not want such a confrontation to begin with. Many weaker armies do that to deter a full out attack by a stronger army
True. Many weaker armies use the theory of unacceptable losses to deter a stronger one. Like what North Korea and Iran does with the US. This is done mainly for a self-defensive.
But there are some differences here:
1) India is actually the aggressor party, not China. It actually provoked the border conflicts in 1962, 2017, and 2020. In all of those cases, India acted first, and then China responded.
2) China is not fighting some war of aggression. China actually wants to retake its rightful territory. Its actually a war to defend the motherland. For such a war, the tolerance for losses is much, much higher. We can argue the same for India, but India does not have the same type of national spirit to fight for those lands. Their claim is actually an invented myth. Created by the British, and then adopted by the Indian elites. Then pushed down to the masses via a top-down approach. That's why their Jawans had terrible morale.
So what India actually did in 2020 to now is provoke a border conflict with China. China responded, and both sides are now at a standoff, waiting to see who blinks first. Then India puts their Brahmos missiles at the border to 'deter' China from taking military action to get back its own territory? China's great restraint now, is not because of those Brahmos missiles successfully deterring it. It is because China wants to avoid war as much as possible. So if India does provoke a war, those Brahmos missiles essential becomes blackmail. A lousy piece of blackmail that actually angers more than it frightens.