Local running club is preparing to certify their upcoming race course. Club member has said "Does certification make the course any more accurate? Maybe."
Seems to me they miss the point. Certification means accuracy. Unless it is later found that the certification was done improperly, you toe the line on a USATF certified course and you can take the results and use them for WR purposes, NR purposes and for the local 10K sans Kenyans and others, for PR purposes.