Generally speaking, I agree. But there are some people who want HD originals and then give SD copies to family or friends who don't yet have HD playback equipment. In this case, then if the camcorder supports 1080p25 recording (which in Canon PAL camcorders is actually PSF encoded), it's fairly easy to convert to 576p25 once you acquire software which properly supports the editing of PSF-embedded videos. (After all, resizing of progressive-scan video is a piece of cake compared to the resizing of interlaced material.) Plus, if 576p25 content is to be written onto PAL DVD, it should be done so with an authoring software which applies the proper 2-2 pulldown for compatibility with standalone DVD players (which are native 576i50).
However, many PAL-market HD camcorders only record in 1080i50, which is much more difficult and time-consuming to properly convert to 576i50: The video editing software programs by themselves do a terrible job of converting from one interlaced resolution to another. They usually cannot pull individual fields apart (which is required for the proper interlaced-to-interlaced resizing), and their resizing engines do not properly resize half-frame fields without introducing artifacts. As a result of this, additional (and often expensive) processing software and/or hardware is required to do this properly: These specialized software programs and hardware devices pull the individual frames apart into half-frame fields, then apply adaptive deinterlacing methods, then (if an interlaced final result is desired) apply scan conversion to the video. The speed depends on the hardware and software used: Expensive specialized mastering-studio-grade hardware does this in real time, but software resizing programs on a typical high-end PC may take several hours for each hour of video reprocessed.