They should ask why people feel pushed out of multiplayer content. Or rather, dig deeper and figure out why it’s not meaningful to deal with the risk of failure or toxicity.
It’s almost like playing for weeklies that lock down playing content like a chore that doesn’t respect certain playstyles, or enforces a rigid one that’s unfun for many, pushes people out of multiplayer.
Delves being popular does not mean delves need to be nerfed, it simply means the company failed everywhere else with multiplayer content systems design.