I also think Bishop wouldn't be the Sens best goalie even if he was here. Anderson is a better goalie IMO. Bishop looks good in a good system and good team in front of him. He's going to be exposed if he's traded somewhere like Dallas or somebody worse. He's not worth 49 million over 7 years. Not even close.
Goaltending is a double edged sword so to speak. If you are a team who develops and acquires goaltenders well, you're always going to be giving up good ones because you can only play one at a time.
and yeah, there have been many, many worse trades in the last decade.