At that time, they hadn't drafted Daniels yet. Johnson wants to have a good QB. I think he might have taken the Washington job if it were open now after the year Daniels had, but obviously that isn't happening.
The Bears already have Williams. They have a ton of pieces on offense that can easily play in Ben's offense on a one to one basis:
Caleb - Goff
25 Swift - 23 Swift (Or Gibbs if you will)
DJ Moore - St Brown
Kmet - La Porta
Odunze - Williams
They just need to rebuild the line and they are off to the races.