What exactly is so terrible as long as you're willing to take a small to moderate risk of getting a PVC pipe stuck in the ground and keep in mind the presented cautions -- consider the water irrigation-only/non-potable until tested (possibly even if tested, although that's not what the site says)?

Badly dug, uncapped wells can also exacerbate groundwater contamination, making the problem worse for everyone else.

Its pitched as just for irrigation, not drinking water. Not nearly as dangerous as a result.

Perhaps, but a really cool thing to know, and you're much less likely to hurt yourself. I enjoyed the read :)

Maybe for use as drinking water, but for watering flowers etc. it is perfect.