I dont think anybody oppose or saying def is worthless, find a quote from anyone that says that, people just dont want new PLDs that really do want to immerse themself in accomplishing endgame to listen to you bc while yes that DEF/turtle build has its uses, it is not doing it job well and very non optimal when it comes to accomplishing speedruns which is pretty much what everyone is after.

Taking less damage has no use if it means DPS has to hold back because prolonging fight just makes the fight more dangerous.

I am also not here to say def is worthless, but i will here to say to Ace that you are burden to a party and probably the cause of terrible boss runs.