Bhutan surely know what they want, we can offer more incentive deal than what India could have done for Bhutan, take Nepal as example we offered 8 billions compare for a peanut 300 millions that India could offer and India know that it can't compete with China, so talk about defending Bhutan is just a pure bullshit excuse.
No matter how you hardening your position, you will never ensure to hold any advantage over China, our military budge is 3x of India and if you take into consideration of value engineer of our military output, we're more equivalent to US defense budget, just do a math and you can see that we can bring six to ten time the destructive power at your border any time.
Again you just delude yourself with wargame, it's not a commitment nor treaty, you can keep fantasize that other power will come rescue India, most likely these countries such US, Japan and even Vietnam will laugh at India for being so naïve, they all are premium trading partner with China, they do wargame just to show their unhappiness to China but ask them if they're willing to cut trade and tie with China for the sake of India...LMAO.