I constantly see 3 main retirement guidelines....

1 - You should save 10x your current salary before age 65
2 - Use the 4% rule to calculate expected retirement income
3 - Plan to spend 70%-80% of current spending during retirement.

These seem incompatible to me. Let me present my simple math for somebody making $100k/year.

At age 65 I'll have $1,000,000 save for retirement per rule #1.
I'll be able to draw out $40k/year based on rule #2.
So based on rule #3, I'm nowhere close to having enough money in retirement.

Is this all based on have a generous Social Security income as well? It just doesn't seem to add up to me.