This is ridiculous. You are telling me that stating God did something He never said He did isn’t adding to His word? That is the very definition of adding to His word!
Logically, if there is intelligent life out there then the message of the New Testament would be false; thus believing in aliens borders on blasphemous. I don’t need a special verse telling me there are no aliens, I trust God’s word and lean on His understanding, not my own. Read Job, Isaiah...they both discuss the glory of God throughout the universe, revealing many of its secrets, zero mention of alien life.
I am not saying what God did or did not do. You are the one attempting to state that you know God did not create alien life. Show me the scripture. I don’t know whether alien life exists or not. But I see nothing in scripture that conflicts with there being alien life if God chose to create it.