You're point wasn't what that post was saying. If your position was that Chelsea should spend big on 2 CBs and then use current depth for the rest of the spots, no one would've had an issue with it. Maybe you didn't make your point clear, but it seemed clear that you were arguing that 1 signing is all that was needed.
Chelsea fans would prefer the 3 defenders to be 2 big CBs like Koulibaly and Kimpembe, and then a quality wing-back as our depth there is not good. Ake might be targeted to provide cover at LB/LWB, but I think we'd prefer a more natural fit there instead.