Maybe you should take a look at the stats. If you run a fangraphs on RF for 2017 to 2020 Nomar Mazara doesn't rank in the top 50. In fact he ranked 53rd. Even if you narrow to oWAR only, he still isn't in the top 50. Hell Daniel Palka ranks ahead of him at #77, as does Charlie Tilson at #87, and Ryan Cordell at #100. In fact Nomar Mazara comes in 2nd to last at 112 of 113 offensively during that time frame. Even if you rerun it without his disaster of a 2020, Mazara comes in at 58 of 113.
EDIT: Even if you want to look at the traditional stats, Marara has never hit .275. .266 is his career high. He has carried and OBP in the .320 range. He's hitting a homer about every 30 PAs, so it isn't even like he has been selling out for the long ball or something. He is a decidedly mediorce player with a ton of potential the Sox were hoping would break out. It didn't happen, and he isn't getting an arbitration offer. You can bookmark this post if you like even.