Justin Fields traded to the Steelers for a conditional 6th round pick

Fields’s is $3.23 million. Wilson is $1.8M.

These are bargain basement QBs. Maybe it works out, but it could also leave them with nothing at the position.
For less than an average backup, they have 2 shots to make it work. One is only 25 and is a very low risk proposition. If it does not work out and, as you say, leaves them with nothing at the position, what have they lost? A 6th? They would then be bad enough to be in a position to draft a QB. They would not be tied to an average QB on a huge contract trying to make it work.