First I guess me fig and Vickiii forgot the basic human nature tends to learn from it �s mistakes best and not accomplishments.
Second there is always room for improvement, we are not God (your choice on a which ever one you want to choose) just humans with slight flaws.
Third if we don �t always try improvements then it becomes stagnet and dead, no more great site.
Fourth I think this came from the individual that asked let them know before their printable is taken down. That is a good idea especially if the moderators let the person before hand have friendly advice on what they think might improve it... hence what Vickii said people share, help and talk; it is called teaching and learning and having the material before you will make a better way of doing that instead of deleting and not remember what was wrong in the first place.
We have students, student-teachers, new teachers, matured teachers on this site and we ALL can always have something new to learn. The day we stop learning is the day we have died.
Lastly on the not deleting I had a ws on here that needed a little help, with the original still up a couple individuals gave some friendly advice on making the ws a better one to be used. Once the improvements were done the original was replaced. There was no back fighting and those that were helping me with it could go back and reference the original to see the corrections and make further suggestions if needed in till we thought it was a better ws that could be better used by all.