Nobody is talking about Bieber because he's not the topic of conversation, that's all. The question is whether it makes sense to bring Scherzer back or do another Scherzer type deal with someone like Verlander.
Even if you want to compare their postseasons for some random goal-post moving reason, their playoff stats are not that comparable. Scherzer got incredibly lucky, Bieber had very normal luck and generally deserved his results. Maybe Bieber was helped out a bit by the good defense, on some hard hit balls, but that's about it. Look at the DIPS collectively along with the K-BB rates, then the LOB% and BABIP.
SCHERZER
BIEBER
ERA
3.77
3.86
xERA
4.65
4.49
FIP
5.58
4.26
xFIP
5.44
3.99
SIERA
5.05
3.77
BABIP
0.237
0.321
LOB%
87%
78.90%
K-BB%
8.60%
14.50%