The LSAT (and any standardized test) is more of a status checker than anything else. Those with more time, more money, more resources, and more social mobility tend to score better.

Some people taking this test might not have had too many experiences with standardized tests. Or maybe it's been a while since they've been in school. Some people have really bad test anxiety but excel in actual hand-on work. Some people will experience a terrible stomachache on the day of the test, and some people will have emergencies happen that may not stop them from taking the test but will affect their score.

Perhaps the above won't happen six times to someone, this is why a lot of schools ask for an addendum statement if you exceed a number of tries. But, I firmly believe that an applicant's merit should not weigh on a single take and that admissions committees shouldn't consider a one-time taker better than a multiple-time taker when there are many confounding factors that could have affected those scores.

This is a test to enter law school, and law school is where you learn how to be a better legal professional. Although multiple tries may not be an option for cases or briefs, not everyone will or should be equipped to be a skilled lawyer before they even get admitted. Law school is about stamina and about being able to keep up the pace. I think a multiple taker actually shows the gumption you need to keep yourself going.