I disagree because they communicate different things (to me).

Seeing Bootsrap for some custom software at my university pre-llm: "I think that a programmer made this and didn't have a designer helping them so they just used a library"

Seeing vibe-coded frontend: "This app may be entirely vibe coded so I am deeply suspicious of it, or it could be a programmer who didn't have a designer helping them and thus used Bootstrap"