The Glock, Walther PPS, or Springfield XD (or any other pistol with only passive safety devices) have no controls* beyond the trigger (and in the case of the XD - grip safety), many have reversible or ambidextrous mag releases, leaving the only annoyance to the sinister shooter being brass ejection** and the positioning of the slide latch for maintenance/malfunction clearing.
*(not counting the slide latch, because you shouldn't be using it during a reload anyway ... slingshot works on just about every autoloader, so USE the method that works on just about every autoloader!)
**(the Walther p.38 family ejects left, by the way ... the p.38, p.1, p.4, and p.5 are the most common examples ... all can be run with either hand, if left in DA->SA mode with a round in the pipe, hammer de-cocked, and safety [if present] off, which is a perfectly safe condition in a holster)