I have read and seen old electricians checking AC mains voltage across two fingers on the same hand using a certain technique. If you use the wrong technique, the muscles in your hand contract, which is bad. Also, current running through your hand can "cook" the muscle tissue. Decades ago, I had a hot dog cooler that worked this way, until they were banned due to occasional electrocutions.
If you run current across two hands, it will pass through your heart, often causing it to stop beating, and sometimes cooking the flesh on your hands.
You are asking about DC, which is worse. AC has a cycle to it, and 60 times a second it passes across zero-volts. This means it is easier to pull someone off if an AC short. Not easy, but easier.
DC is constant flow. Dry human skin is considered safe to handle electricity up to 60V, and a fully-charged 14S pack is 58.8V
Of course, many members have gotten a jolt from 72V, and they are alive. If your skin is sweaty, that means its covered in saltwater, which dramatically improves conductivity. Years ago, prisoners who were killed in the electric chair had their head shaved, and a cloth of salty water was placed on it.
The higher the volts, the farther a spark can jump through the air, so...the farther apart the contacts should be inside a switch. Also, the higher the amps, the faster the contacts should be.
With high-voltage DC, it is hard to break the arc that will be flowing through the air when you pull the contacts apart.
If you truly "need" 24S, I recommend two 12S sub-packs, that are connected in series to run.