[Because there was no constitutional question before it to resolve?]
No; "Because the Court of Appeals did not address these claims
Yes. If the Court of Appeals did not address these claims, then there was no constitutional question before the USSC for it to resolve.
And as previously pointed out, there is no judicial controversy to settle on that point. The constitutionality of the CSA has been upheld every time the question has been considered.
The constitutionality of slavery was upheld every time the question had been considered.
The constitutionality of gun restrictions were upheld every time the question has been considered.
The constitutionality of unlimited taxation has been upheld every time the question has been considered.
The constitutionality of damn near everything congress can dream up has been upheld damn near every time the question has been considered.