I agree with much of what you post, but here we have to differ.
Dejounte is not really all that small for a PG. (6'5", 180)
Lilliard - 6'2" 195
Derrick White - 6'4" 190
Trae Young - 6'1" 164
Kyrie Irving - 6'2", 195
Ja Morant - 6'2", 174
Jamal Murray - 6'4", 215
and so on.
Granted, some are bigger:
Doncic - 6'7", 230
Shai Gilgeous-Alexander - 6'6", 195
And more (tired of looking up stuff but bigger guys are out there).
The bottom line here is that Dejounte is not small. He is average to above average in size.
BTW, CJ is a little small for a shooting guard at 6'3", 190. But not terribly so.
All stats from espn.com.
PGs found here:
https://www.espn.com/nba/hollinger/statistics/_/position/pg