I see it very different.
I see closers as massively over appreciated, especially in terms of salary and fan love. The game isn’t always on the line when they pitch, contrary to public opinion. There used to be a stat called “tough saves”, which is now hard to find. But tough saves were saves where the pitcher entered the game with the tying run on base. Typically the league leader had 4 or 5 tough saves.
Now the rest of the pitchers in the bullpen are the underappreciated ones, unless the team has a LOOGY. Those lefty specialist guys are overvalued and usually worthless, and in my opinion, detrimental to the overall success of the bullpen...