Stat squish confirmed: How will unsynced old content be handled?

[Hycinthus]

He said it was the only thing the stat squish would affect.

Yup, this sticked out to me too, he said unsyncs will get harder with stat squish.

But can someone explain to me like I'm 7, why stat squish will affect unsyncs? Like didn't he say relatively, if players and mobs are squished by 25%, meaning everyone gets weaker by 25%? Why does it affect unsync?

Let me write it out, let's just divide by 10, or delete 1 zero.

Before Stat Squish:
My level 80 PLD
My HP = 1000
My Damage = 100

Level 80 Dungeon
Boss HP = 5000
Boss Damage = 500

Level 40 Dungeon
Boss HP = 500
Boss Damage = 50

I go into level 40 Dungeon unsynced. My Stats are 100% higher than the level 40 dungeon.

Now Stat Squish - divide all by 10.

My level 80 PLD
My HP = 100
My Damage = 10

Level 80 Dungeon
Boss HP = 500
Boss Damage = 50

Level 40 Dungeon
Boss HP = 50
Boss Damage = 5

I go into level 40 dungeon unsynced. My stats are still 100% higher than the level 40 dungeon?

Relatively still the same right? Sorry that I am not familiar with stat squish concept, can someone correct my example above if this is wrong?