I get the theory, but I've seen the effects of that decision.

The pre-objectivity police StackOverflow was sooo much more useful (2010ish). 85% of the top 1000 questions had incredibly well written and insightful answers to subjective questions. Things like "How do I become a better software engineer?" which is far more useful than "How can I rename a local Git branch?"

For a time these bled out into other smaller stack exchange communities, but many eventually fell to the objectivity police.