What Fingers do you use to play Major Scale Pattern Using Three Notes Per String?

I read carefully un article about Major Scale Pattern Using Three Notes Per String but I have a big doubt

In the article the author explane: Follow these instructions for your fretting hand:

on the sixth string, use your first, third, and fourth fingers. Pick down, up, down. on the fifth string, use your first, third, and fourth fingers. Pick up, down, up. on the fourth string. Use your first, second, and fourth fingers. Pick down, up, down. on the third string, use your first, third, and fourth fingers. Pick up, down, up. on the second string. Use your first, third, and fourth fingers. Pick down, up, down. on the first string, use your first, third, and fourth fingers. Pick up, down, up.

My doubt is because the pattern for fourth an third strings is the same and for me is logical use first, second, and fourth fingers to play on both string

Why does he recommend to use first, third, and fourth fingers on the third string?

Could your clarify it for me? What will be technically the best way to play Major Scale Pattern Using Three Notes Per String?

Thanks a lot in advance,