For crying out loud, people - it was a question!
No worries, and it was answered in a manner of operational considerations. You are correct to question the wisdom of continued operation and I guarantee it was way up there in the PIC's mind as well. As with any command decision of this type you have to take in the data you have and figure out your best course of action.
The primary consideration is going to be vibration, if it's shaking hard it's a shutdown before it all comes apart, that's the first 3 seconds after the strike. If it hasn't come apart in the first three seconds, you've got time. Now you have to assess the situation; you have an injured hiker and a crew member, likely a buddy you have nearly killed, lying on a rock that if you shut down you'll likely be blocking the only rescue zone.
Your options are basically set it down at the edge, get everybody out, stand on the skid and give it hard cyclic to dump it over the side and clear the LZ. Now you have to wait with bare minimal medical gear, you, and 2 patients and whomever to be picked up be whatever other resource is available. That or get everyone loaded ASAP and get the thing to the hospital landing pad, or as far as you can before it starts vibrating too much to continue.
That is the reality of being PIC, you not only have to question the wisdom of your thoughts and actions, you have to decide on them within seconds often, sometimes less. Sometime you decide right, sometimes you decide wrong, when you decide wrong, people die. That is what it means to be 'in command' it's all on you, nobody else to blame, nobody else to ask.