And the Federal government was granted the power to create new states in Article IV, Section 3.
The right of a people to choose their own form of government is argued quite effectively and eloquently in the Declaration of Independence.
And is limited to a republican form of government in Article IV as well. Section 4.
Article III, Section 3 of the Constitution grants the federal government the power to ADMIT additional states to the Union, but nowhere in that document is the federal government empowered to create new states.
And unless Congress admits them then how can they be states? The act of admitting is also the act of creating.
Exactly how much power do you want to give the federal government, anyway?
The amount provided for by the Constitution. No more, no less.
Apparently, you do not know the meaning of the word state.