It doesn’t exist indeed. I understand the PG maintainers stance, but I can’t agree with it.

First because “we get bugs fixed quickly” is true but not true enough (my own experience: https://www.postgresql.org/message-id/17540-7aa1855ad5ec18b4... has not been fixed since reported 1.5y ago)

Second because all the knobs available to tune the query planner (listed in your last link) are obscure and require deep understanding of Postgres internals to make sense of them, which means that only a fraction of people understand them whereas query plans are more pedestrian. They’re also often database-scoped or session-scoped rather than query-scoped, it’s a huge risk of making things worse rather than better.