I'm not exactly sure what it is you're decrying. That we'll lose a significant quantity of Earth's hydrogen to space, leaving the atmosphere with too much oxyge

I'm not exactly sure what it is you're decrying. That we'll lose a significant quantity of Earth's hydrogen to space, leaving the atmosphere with too much oxygen? That we'll suffer a water shortage because we're using too much of it to make hydrogen? That nations will increasingly ignore other nations' aerospace sovereignty because balloons are filled with hydrogen instead of helium? Hydrogen is still expensive to split from water, and the quantities required for deleterious effects to present are so high, that these are really distantly hypothetical "what ifs".