There is a difference between the proposed tax levy on remittances, by the US, and the TCS levied by India.
The TCS levied by India is tax deductible/refundable, unlike the proposed excise tax by the US.
The excise tax being an indirect tax, is nothing but an additional expense to legal immigrants, which will not get adjusted against their tax liability or be refunded.
So, this proposed move, will not only affect the NRIs, but will, to some extent affect our current account balance, as inward remittances form a major chunk of it.
Trump and common sense are poles apart.
PS:
Something i remembered on the topic of inward remittances.