You can remove the plugs without damaging the OEM wires, but few owners (or techs) want to take the time to do what is necessary to accomplish this. The factory does not use spark plug boot release, which compounds the problem. The caps then stick to the plug insulator. To be safely removed, the boot must be grabbed directly, right over the plug, and twisted gently back and forth a small distance, until it releases. The wire can then be gently pulled off by the boot. Unfortunately, there are some huge obstacles to this procedure. The spark plugs are in deep recesses, which makes the boots hard to reach...especially with a hot engine. The airbox is in the way, too, and must be removed to properly access the plug boots. To add insult to injury, the wires can also be damaged where they are pinched down where they are routed through the heads...simply by pulling the wire loose.
Plug wires these days are what is known as suppression wires. They are constructed in such a way reduce radio frequency interference (RFI) and electromagnetic interference (EMI), both products of passing a current through a wire. The OEM wires are carbon suppression conductors. They are not actually "wires" at all, but usually threads impregnated with carbon dust, although they may actually be carbon filaments. Pulling on them, bending them, or just time itself, can separate the carbon, increasing resistance and reducing the voltage going to the spark plugs. In severe cases, the resistance becomes so high that the electrical pulse penetrates the insulation and jumps to the head, cylinder, or frame, instead of flowing to the spark plug where it belongs. Good aftermarket wires are what is known as magnetic suppression wires. They consist of a solid carbon filament or wire core, surrounded by a wire wound in a spiral around the core, to block the interference (RFI or EFI). These are much sturdier, usually electrically "quieter", and if installed and removed properly, with the aid of a tiny bit of plug boot release (dielectric grease), they last much longer and perform as well after many miles as they did new. They usually also have better insulation to prevent spark jump, and offer less resistance, delivering more voltage to the plugs. IMO, you cannot go wrong with installing good aftermarket wires on any vehicle, when the time comes.