not OP, but not necessarily. the general reason is not that indians are worse developers per se. in my opinion it's more about the business structure. the "replacement indian" is usually not a coworker at the same company, but an employee at an outsourcing company.

the outsourcing company's goal is not to ship a good product, but to make the most money from you. so while the "indian developer" might theoretically be able to deliver a better product than you, they wont be incentivized to do so.

in practice, there are also many other factors that play into this - which might arguably play a bigger role like communication barriers, indian career paths (i.e. dev is only a stepstone on the way to manager), employee churn at cheap & terrible outsourcing companies, etc.