I am one who can be in this boat and don’t know what to do yet.
And even with that, there are still 600K Indians trying become US citizens.
Coming back to the parents, now with all the negative coverage of H1B in Indian media, people have a negative perception of being in US. My visa expired and is in process of renewal. I didn't go to office one day. My dad thought I wasn't going because I was hiding from the authorities since my visa expired. They have been asking me to come back for a while now.
600K Indians out of 1 billion is nothing. Huge number of Indians don't want to leave India. I hope you know that. It becomes more evident once you are in the marriage market. Lot of them are downright reject proposals from people who work in US. Also, I never heard of Canada immigration until 1 year back. Now, a lot of my friends/colleagues are talking about or in the process of applying for the Canadian visa.
And a good number of those who apply for green card don't do it because they want to become a citizen. Its because once you complete a certain stage of green card (I-140), you can continue working in the country. Otherwise, you have to leave once you complete 6 years. They plan to work for 10-20 years, and come back to India and retire nicely with all the money they made in US.
You'll universally find a much better healthcare system (e.g. health insurance not tied to your employer), with the exception of the UK. You'll find a humane immigration system that doesn't kick you out if your employer decides to screw you over (again with the exception of the UK). You'll generally have some form of state support if you lose your job instead of being thrown to homelessness. Etc etc. The US is a second world country nowadays.
And any children you might have will be far safer, and at lower risk for severe mental health problems.
On the other hand, the private insurance in the UK that's usually included in big tech companies' work is absolutely top-notch.
For example, in big cities in Europe, you can easily and happily get by without a car, which saves a lot. You have more vacation. No tipping. Easier/more obvious ways to save for retirement. Your kids not having to do active shooter drills at school. Cheaper/free schools and universities. Maternal/paternal leave. Etc, etc.
So if you have a family, or thinking of starting a family, it's worth factoring that stuff in.
The NHS has something of a funding crisis right now, since our government seems to secretly want to privatize it, but it's still better than losing your health insurance if you lose your job.