I can not necessarily connect my speakers. Yes, the remote control is essential for the equipment and should, in my opinion, be always with you. No, it is not true that you have to stand in front of the camera to trigger can. I now have dozens of times triggered the camera with remote control and I was every time behind the camera !!!
Conclusion: A must for all the blur-free images for example when shooting at night on a tripod want without even touching the camera.