You could, but you don't have to. A 1t difference in capacity is pretty irrelevant. Those numbers are for reference. The other thing about triples is they have a ~22t capacity from big ring to small, say 52-30, but that's over three chainrings, not two. And triples have a suggested middle chainring capacity limit of ~12t between the large and middle. So, technically, a triples capacity from 1st to 2nd is less than a doubles capacity from 1st to 2nd, meaning you will probably get better performance from a double.

The standard double front derailleur works fine as long as it is adjusted properly, meaning set to the correct height in relation to the large chainring and angled properly in relation to the chain. Some posters above have given good advice on this. Most books on bike maintenance and probably the Park site have a front derailleur adjustment section to show how to do this.

The key is to set the front deraillleur as low as possible and to get the correct angle, which will probably be front slightly toed in, but that will come in the final adjustment.