Pretty simple neither Hossfelder, nor politicians, nor you get to tell people what they would like to do. At this point it becomes a power struggle and so far mainstream physics has won that power struggle, because we have good arguments on our side. Investment in particle physics has had large net positive effects on society at large. Why kill the golden goose just because you aren't interested in whatever these people are interested in. Science doesn't enter this argument at all, purely from a technology and human capital level this is close to optimal use of their talents. You have a bunch of high y motivated, talented people working towards a common goal. Even if you don't perfectly understand why they would do that, their results alone are convincing enough to let them continue.