First, the "complicated and silly" parts of the LBR are the 42 different variations of what can happen on a BR who overruns 1B, not about the rule in general.
Second, pardon me while I weep and moan for those poor pitchers who are being taunted by a mean runner on 3B while the BR is advancing to 1B. We need to put a stop to this or some kid might cry.