Have the same issue and concern Wakaitsu has, and also find this to be utterly unacceptable. No, I won't ignore anything super-lame like that.
There's a remove button, which removes BG3, Halo or Witcher3 extensions, followed by Vortex restart, after which they are installed anew with zero notice: at the very least that's confusing and irritating.
How come Vortex needs them to function if it doesn't manage any of those games? A rhetoric question.
Even if they don't cause any problems for me, and benefit other users, they take up space and clutter attention. Dipping a cheesburger into cola by default is not a feature — it's a bug.