(Whatever, this is a technicality not relevant to the argument.) I doubt having insight is a downside in itself, only perhaps in as much as it makes it no longer possible to gain that insight without also losing it first; and beside the gaining of insight, there are lots of other things people value.
Having an insight can be a downside if the insight disrupts your worldview, or makes you face an unpleasant truth. There is no law saying that truth and happiness are always allies.
(Whatever, this is a technicality not relevant to the argument.) I doubt having insight is a downside in itself, only perhaps in as much as it makes it no longer possible to gain that insight without also losing it first; and beside the gaining of insight, there are lots of other things people value.
Having an insight can be a downside if the insight disrupts your worldview, or makes you face an unpleasant truth. There is no law saying that truth and happiness are always allies.