Durk and Baby sodl out the Barclays within the last couple years though. They have had success doing arenas, specifically in the south and in major east coast cities. The problem they had previously was not selling out arenas in say...Iowa. Places where a Drake/Kendrick/Cole/etc can easily sell out and stitch together a huge tour that crosses the country.
I think the issue is that this is essentially the third big tour they've done within a three year span, and unlike in 2021/2022 there is far more competition. Last year it was just Kendrick. This year it's Drake, Beyonce, Taylor Swift, Morgan Wallen, etc.
That being said I do think Baby needs a career intervention. Sentiments could be changing right now. I think he needs to revisit the type of beats he's on, the sound, etc.