The logic is that anything which the NORMAL USE of gets one high should be illegal.
Millions of people have a glass of wine or two every day and do not get drunk.
But one inhale on a joint of weed is enough to produce a high.
That's the difference.
Your position is common among those who support legalization. But it's wrong, because of the above.
I "highly" doubt that (pun intended). Have you ever taken "a puff on some weed" yourself?
In the past I have occasionally taken a puff or three for its anti-inflammatory and other medicinal effects. Even a few puffs have never gotten me anywhere near high.