Y'know I just had a crazy thought unrelated to this joke.
Hear me out, if Araki (And Joseph) didn't forget that Stroheim found out UV rays are effective against pillar men and probably vampires too.
Then if we forget about DIO's plot armor, the crusaders in part 3 could have just bought a ton of UV lights and used them to set a trap for DIO.
It would have been much simpler than using their stands.