Those points are true but if I raise the flop and we somehow get all in, my hand is not as strong as it would be if we got all in on the turn.

Huh?

Actually 8% equity is quite a lot, as it gets more and more valuable the further from 50% (or rather from the breakeven point) you get. Ie: 50 to 58% isn't worth that much, but 90 to 98% is a huge difference (one in ten vs one in fifty). 74% is abouy 1:3 but 82% is 1:4.5.

Or put another way...

Say someone open pushes $100 and you call with AKs, he has 22 and you have 50% equity. So you'll break even. If you have 74% equity, you will make a $48 profit. If you have 82% equity you will make $64. That's a 33% increase in profit. So in this case, 8 percantage units in equity will generate 33% more profit.

Of course the increase is usually not quite that big since the pot odds are usually better. Say he pushes $100 into a $120 on the turn and you call with 74% equity, you will make ~130. If you had 82% you'd make ~160. Not as big of an increase, but still more than 20% more profit. Of course with 100% equity you'd make $220. Which is a 70% increase in profit, but only 26 percentage units difference in equity.