I think people are saying DWG are #1 potentially from "Play-Ins" and "Play-Ins" only. If anything, if people think so highly of DWG than they must also think highly of Team Liquid, because they literally play the same style and objective focus.
They are Korean and teams don't want a Korean team in their group because they typically end with a 4.7 wins per year/per team on average since 2014 in groups. 12 out of 15 times a Korean team has ended in 1st place in groups and teams don't want such headache is all.
I've watched Cloud 9's group draw and this is what I understand from such
_' Wait, than we don't get Damwon' - Blaber 2.32
' Group C still has a chance to get Damwon' - Reapered 3.26
' Wait, so they can still get Damwon? So their group can actually be a group of death'? - Zeyzal 5.51
'Group B looks weaker but if they get Damwon than they aren't that weak' - Licorice 6.14
Here is Team Liquid's group draw mentions of Damwon Gaming
'Damwon is not/such a disgusting team' - Corejj 5.33
I couldn't tell if CoreJJ said 'not' or 'such' a disgusting team'
They are speculating on where Damwon is going and never stated they are #1 or the best team at Worlds once. The only thing I heard that remotely stated that meant anything was (if X group has Damwon than it's not a weak group). In this case Group D has a chance of getting not only IG but also DWG and let's be real...Cloud 9 is the only NA team to ever make it out of groups with a Korean team and Chinese team in the same group. There's a 60% chance you won't make it out if you are Team Liquid if DWG are in Group D.
_SSW/EDG - 2014
SSB/OMG - 2014
SKT/EDG - 2015
KT/OG -2015(LGD didnt' )
SKT/C9 - 2016(IMY didn't)
SSG/RNG - 2016
SKT/C9 - 2017(EDG didn't)
RNG/SSG -2017
RNG/C9 - 2018(GEN G didn't)
KT/EDG - 2018
_
In short these are the Western teams that have made it out of Groups with a LCK and LPL team
( Origen 2015 and Cloud 9 2016, 2017 and 2018)
These are the western teams that couldn't do such
( Fnatic 2014
LMQ 2014
H2K 2015
TSM 2015
TSM 2016
G2 2017
Vitality 2018
TL 2018 )