Not really, it depends on the risks they were willing to take. How close to get the carriers flying them off to Malta or how many crated aircraft on freighters they were willing to loose. 8 crated planes on each of 6 freighters gets you 24 delivered Spitfires even if 50% of the freighters were sunk. Granted you have to assemble the aircraft rather than just refuel them in order to use them.
First which carriers? Those that could launch Spitfires equipped with ferry tanks were few, far between or sunk. The freighters were carrying other essential supplies to sustain Malta and these would have to be removed to make room for a handful of aeroplanes, dribs and drabs. I doubt that you could fit a crated Spitfire in one of the submarines which did such sterling service in the supply of Malta
The people at the time had to fight the war, not just the Mediterranean campaign, with the limited resources available. Hindsight is a luxury they did not have.
Any Spitfire sent to Malta or anywhere else is one less available for ADGB, Fighter Command's primary responsibility and the reason for its existence. Again people are using hindsight. It was not clear at the time that the Germans might not attempt some kind of renewed assault, aerial or otherwise, on the UK in 1941.
Cheers
Steve