Seems like, in aggregate, the question is whether adding variance to outcomes is net positive or negative?

Some students will receive multiple consecutive years of excellent instruction, others will receive multiple consecutive years of subpar instruction. Does the upside contain innovation and social mobility? Does the downside contain increased disillusionment with school and education broadly?

We pull the goalie when the odds are against us and increased variance is desirable. Is this such a case? Sadly, it may be.