Not really, because the same criticisms of SMGs also apply to SBRs/carbines. In a military context, carbines make a lot more sense over SMGs since it simplifies logistics (lots more parts continuity and ammunition compatibility), but that doesn’t apply everywhere. In a non-military context SMGs and their PCC counterparts make quite a bit of sense, especially with regards to home and civil defence, since they’ll likely share ammunition commonality with guns that people already own (pistols).
Beyond that, physics favours SMGs/PCCs, because unless your gunpowder is anti-matter based, anything with a barrel under 16” for 5.56 is leaving ballistics performance on the table. IIRC for 9mm the optimal barrel length for conventional loads is like 6-8”, with anything above 10” being pointless, meaning that pistols are already a tradeoff between compactness and ballistics performance. In that case, why not also get something that uses the same ammo that your handgun uses, but more effectively and in a more practical package?