This statement is false too.
https://www.teamrankings.com/nba/stat/assists-per-game?date=2015-06-16
'14-'15: #13 (average) *This was the last year of LMA, Batum, Matthews, etc*
'15-'16: #20 (bottom 1/3)
'16-'17: #26 (near last)
'17-'18: #30 (last)
'18-'19: #26 (near last)
'19-'20: #30 (last)
The last 4+ years, Portland has been at the bottom of the league with assists. I think this does show how important it is to have a legitimate second ball-handler/distributor on the team. Ever since loosing Batum, Portland has struggled to keep the ball moving.