Fields being traded to Pittsburgh

Im not arguing that the Steelers may do this but it makes very little sense to me.
Wilson was traded off the Seahawks leaving them no plan at QB because he was a prima dona. The Broncos quickly found this out (along with the fact that his play was not as expected). If anyone feels JF1 was shocking, the hit the Broncos took to get rid of him was historic. Wilson will be turning 36 this year.
Nothing could surprise me after this offseason so Steelers signing him long term will seemingly happen.
Looking at JF1s rookie contract then he would only be a 1 year backup? They need to opt in for his 5th year by May if they want to have him year 5. I would think the Steelers would want to work out a Love type of contract to keep him yr 5 and on while saving money. He just turned 25 this month.

I mean they are friends after all. Friends usually back each other up. 

Keeping Flus was not a sound business decision. It really makes zero sense while bringing in a rookie QB to a defensive minded HC who has a losing record. 

Yes, I agree, but really don't think it will happen. If Waldron does great things, it also makes the HC look good. I've never seen a successful season happen and then management says "this success was due to our OC and so even with a great year, we are going to replace our HC with our OC". The OC moves on, the HC stays, hires someone else and sputters for another year or two then gets fires (sometimes with the GM because they did not take earlier action). We have seen this movie before.