It is. The boats have lifts of course. Scotland is not some third world country.I somehow assumed that it was a ladder to get back in town at low tide, not a ladder on the boat itself
Double checking on google street view it looks like 5m. There is a bloke getting onto a boat farther into the harbour where it dries out and that ladder is twice his height. The ladder in question faces away and is in a slightly deeper bit. The tidal range this weekend is just over 5m. I have never seen the water come over the quay there, but of course you don’t try to choose springs.
Street view can be very helpful in sussing out harbours and entries when you are hundreds of miles away.
You can choose to have your kit craned on or lowered/lifted on a rope over the quay side. If you don’t like that you have no choice but to carry it. If you haven’t planned for that and all your stuff is in plastic carrier bags or loose then it is a complete pain.
So, when the Dive Manager tells you to make sure your kit can be craned, listen and do something about it.