Marv had a double-double (16-11), made all his free throws, and didn't commit a turnover. Kanter matched his score but only grabbed three boards, went 4-6 from the stripe and committed two turnovers. Strange definitions of "great" and "bad" you use.
Because it didn't REDUCE Kanter's minutes? If you are "taking" minutes you are "reducing" minutes.
If you are just rebadging the "bench MW" argument, Marv's minutes have been cut already (from averaging 28 mins/g in December to 23 this month) with the extra minutes are going to Hayward (from 34 in Dec to 38 in Jan). Enes' minutes are basically the same (21 to 22). Marvin is actually losing time to Hayward and Kanter.