Would it be appropriate for experienced domainers to criticize heavily?

I have reguarly read the blogs and posts from experienced domainers and I find them quite insightful. But some experienced domainers criticize domain newbies heavily and I found it a bit strange. In every field, there are newbies and we couldn’t expect them to know all the things in a very short period of time. I am a medical professional and I got medical students and junior doctors all the time under myself. I couldn’t expect them to know all the things and it takes a few years to learn skills to be more and more competent. We have to guide them in a supportive manner and it would be unfair to criticize our junior colleagues for not having confidence to handle difficult cases.

I really think this also applies to domaining. I believe I have read that even Frank Schilling registered very crappy domains during his initial few years. In our medical field, there is established textbooks, medical schools, training institutes etc… and it takes usually 7 years to finish medical training and another 7 to 10 years to  become a consultant. In domaining world, many experienced domainers usually keep their ways of success to themselves and it makes more difficult for domain newbies to learn from their mistakes and so on. But over the years, if any newbie is persistant enough to pursue his or her interest, the skills & knowledge would improve over time assuming that there isn’t anything wrong with the newbie mentally.

Quick domain flipping? Telephone.net flipper

I noticed that the domain, Telephone.net was sold at the Vancouver Domain Auction for $18,000 and it was a good flip for the seller because the domain was bought by him or her at the GreatDomains.com domain auction for around $10,000 less. Telephone.net went for $8,422 at the GreatDomains.com auction a few days ago. Now the domain was sold within a matter of days at around $18,000. What a domain flipping? The seller made around $10,000 profit in just a matter of days. Congratulations for the domain seller.