MSd...I agree 100% with your post in general, and I probably should clarify what I meant.
If you are willing to put the time into keeping a canister filter, all will always be well because of the schedule you keep, and the learning curve of what you should/n't do.
Because of the system I run, unfortunately, it requires I test my water every 3-5 days which I do. As soon as I ever see even a slight increase in nitrates, I do a small water change of around 10%. And I used to have to do this a lot of times because of overfeeding (2 times a day sometimes!), poor circulation ( I didnt have a powerhead for about 6 months! uuugh) and lazy water changes.
I think a lot of it comes with personal experience with your own tank. Now when I do water changes, I vacuum the bottom (crushed coral which I actually love now) and drain out about 15% or so, taking the water from the bottom only through the vacuum.
I do this every 2 tuesdays now. In between these water changes, Ill change out a gallon or two as this is how I add any supplements (iodine, b-ionic etc).
I let the tank circulate for an hour, then I change out/and/or/clean out the media/carbon in the canister.
I have learned to feed only once a day now as well.
In summation, I agree with your post. I think both methods are a mean to an ends,both accomplish the same, just a canister ends up being more work.
However, I have to say...I never worry about all of the water siphoning out of my tank because of a faulty valve, I didn't need a huge area to keep a huge protein skimmer or fuge/sump, and as far as coepodes, i feed my fish anyway, so who cares about the pods?