Don't be foolish. It's never that simple. More radiologists means more power for the collective, even if individually we aren't as well off. When there are fewer of us, then we become more apathetic about turf loss. In fact, this is a reason why the field has lost so much turf in the last couple decades to all these random specialties. We kept saying, "Cardiac U/S? Why should I do that when I can be an RVU machine just reading Knee MR's?" Then we completely lost cardiac imaging, including the NM studies. Over-supply of Cardiologists is interestingly also how Cardiology has poached so much, especially from the CT surgeons, starting 3 decades ago.
Of course, all this sucks as an individual rad trying to find a job. That's why it's about striking a balance between enough of us for the power to sustain the field and not enough of us to individually command/demand power/wealth.
Unless you're an old rad about to retire. In which case, there's no reason to think any way but "screw the collective, give me my money now".