One of the saints (sorry folks, I can't remember which one) said "XP is not a measure of how good you are in Perl, it's how good you are at Perlmonks". And that is completely accurate.

There are monks who are smart and technically proficient but also occasionally post their personal opinions on many different matters inciting downvoting from the other community, usually for good reason. This is a community, and XP is as much a reflection of interpersonal skills as it is technical skill.

Further, many new monks join everyday, and we may have a monk with 10 points, but she's one of the smartest Perl minds you'll ever encounter. Is it fair to her to disregard her answers just because she's got less XP?

For as many reasons as you can gain XP (just logging in, spending all of your votes in a day, etc) it just doesn't make sense to mark each node with the experience level of the writer. It would be (dangerously) misleading.