Any veterinarian who is up to date on pain management does not think that way. One of the vets I work for graduated in 1976 and this is what he was taught, however, he works very hard to stay current on many topics including vaccine protocols, diagnostic testing, etc. He strongly believes in adequate pain relief for post op patients (even cats who need dental extractions). Unfortunately, there are still a lot of veterinarians who think the "old fashioned" way.