Jesus. Make already an argument why this is wrong, instead of just reaffirming yourself over and over you are totally right.

I wasn't, I didn't, and I never said that.

because otherwise we would constantly have to fix roofs we did.

no. the arbitrary difference would be fixing a roof in 9 years rather than 10. I don't understand why you don't realize this.

lets say you have 2 tables.

one table you rush through it and some of the nails are in the "wrong place" (less than ideal).

the second one, you place all the nails in the areas where the nails would be more stable.

Do you think the first or second table would last longer.

Think about it logically. Don't get offended because you admitted to reddit that you rush and aren't thorough with your work.