Anyone who thinks these are comparable should withhold judgement until they learn more about how different kinds of "radiation" work. It's an overloaded term.

X-rays generated by slamming accelerated electrons into a metal plate turn off immediately once power is removed. There is no residual radioactive decay, because there were no unstable or decaying isotopes at any point in the process. It's not a nuclear process. It does not involve the nucleus.

In contrast, the Goiânia accident was the result of beta radiation from a pile of decaying Cesium 137 that could only be contained, not turned off.

Comparing screwing around with dental xray equipment (or any x-ray equipment really) to distributing the radioactive bits of chemotherapy equipment across a neighborhood is like saying "be careful, you wouldn't want to accidentally blow up a government office building" every time someone starts talking about plant fertilizer or lecturing someone who's installing 12v car audio about transformer substation safety practices. The magnitude difference between the subjects is so big it constitutes a qualitative difference even if there is a common element.

Not every discussion about something in the physical world needs to start with a low effort comment about how you can die by cranking it to 11 and then abusing it.

In the context of buying used hospital equipment and the concerns of a layman making a mistake due to the very confusion you highlight... Seems at least relevant.

An x ray lamp is not radioactive unless you are eating bananas.

X-Rays are not "radioactive technology", they are application of high energy particle physics.

Please don't spread around misinformation.

Once the power is off, there is no more radiation from the internals of an X-Ray Machine.

Heck, we have portable X-Ray dental cameras now.

They are still dangerous, but orders of magnitude lesser than true radioactive elements.