No one likes to do more work than they really have to do. In your day-to-day life, this tendency might result in less desirable outcomes, such as performing the sniff test to determine whether you can get another use or two out of your T-shirts.
If you just look at the acronyms — SAT and LSAT — you will come to the (absolutely trivial) conclusion that these two exams are 75% alike. Just slap an “L” on the front, and you’ve got the SAT. So is the LSAT just a lawyer-y version of the SAT? Do you need to know how to find the hypotenuse of a lawyer triangle? Do you have to determine whether the rules of grammar are being violated in a legal brief? Must you memorize the definition of legal terms such as “consideration” or “restitution?”