I like Ake. He seems like a really nice guy and I genuinely think he's a decent centre back. But the truth is that he wanted to go to Chelsea this summer and the only reason why he's not there is because they didn't want to pay what he was worth.
With that in mind, I don't think we should be going out of our way to appease him, especially at the cost of signing another left back. As much as I rate him in the middle, he brings virtually nothing at left back.
So yeah, I just wouldn't understand that decision. I've said all summer (and probably the last few summers) that I think we should keep Zinchenko and sign another left back.