Why doesn't Pac drop to 140?

[RetroSpeed05]

We hear how hes small and his real weight class is 140, i think he should do it and drop down.

140 is hot right now, waiting to see the new unified and lineal 140 champ come out the wssb he should challenge him.

Would be much more winnable than Spence and another big legacy booster fighting another young undefeated champ in his prime.