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Because they measure different things. Search Console counts impressions and clicks at the query level; GA4 counts sessions after arrival. They will never tie, and trying to reconcile them wastes weeks.
The useful move is not to reconcile them but to put both on the same page record and read each for what it is good at.
Connect the property, confirm the URL patterns match, and check parameterised URLs are grouping to canonical records rather than fragmenting.
History arrives from whatever the APIs return at connection — typically a limited window — so connect earlier than you need it.
Different measurement points, plus consent and filtering. Both are still useful.
What the APIs return at connection, which is limited — connect early.
Not required, but it often reveals authority versus content problems.
Half an hour with your own data usually saves reading three of these. The guides will still be here afterwards.