That’s exactly what a “de novo Adam” interpretation is. It’s an attempt to make him, in a creative instant, the first human being ever.
And, as you’ve identified, God would have to consciously try to fool us into thinking Adam had physical continuity with the rest of the hominids, by building a false record in his genetic material, according to the scientific evidence, whether you posit an ancient timeframe or a more recent one --because any interbreeding is, otherwise, by definition, “bestial.” Why would God make mankind capable of interbreeding with “beasts,” and having heritable genetic material in fertile offspring be the result?
Seriously, why torture the character of God, deny common descent, make a complete hash of the geneaologies, just to “rescue” a traditional “de novo” (“de dust” --via a “poof”) understanding of the text, when the New Testament does not require it?