It doesn't always work out that way. A navy needs to manage resources like there is only a certain amount of equipment they procure bcas when it reaches its end of life it needs to be replaced by new ones, and therefore a navy which we can keep modern then the region is good enough to tackle all the problems.
What you have suggested is not possible. Not all the countries will go to war at the same time uniting against a common enemy. Then that means there had been failure in diplomacy of the highest order. That situation has never been seen unless if u talk about world war 1 or 2. We as a nation aren't headed down that road so u can chill.
We don't need to go ballistic and spend too much on defence. What we are spending right now isn't sufficient but gets the job done slowly we will spend more and accordingly alter our plans for expansion of the navy.
If we go ur way then like China we will have countries grouping against us bcas they went ballistic in their naval program. India doesn't want that, we instead want to be net security provider, that means no friendly nation should ever fear us but our enemies must dread us.
Why won't countries unite? Haven't you seen them uniting against Israel?
As long as there are enemies, there is no chilling. We can and must spend most of our money on defence, export oriented services and manufacturing while slashing the consumerism. People must learn to live in austerity.
Consumerism is the most meaningless way if showcasing GDP. Look at Japan, Brazil or Germany. Do you call them as strong countries militarily? They have high GDP but most of them are wasteful consumption.
We must provide security cover to friends like Myanmar, Lanka. But, as you said - enemies must dread us. Muslims are enemies. India is surrounded by many enemies.
We must not forget that Arabs supported Pakistan in 1971. Indonesia offered to attack Andaman in 1971.
