ARIN really needs the concept of sponsoring LIRs, because right now everyone has to deal directly with ARIN and that means ARIN has to fit their policies to try to fit everyone. While it's technically possible to get IPv6 PI space from ARIN as an individual person end user, and it's gotten easier than in the past, it still looks really daunting to the hobbyist or small network operator.
As for LIRs handing them out like candy, I joined RIPE as an LIR and RIPE will allocate an IPv6 /29 to an LIR for the low cost of zero Euro (well, except for the membership, which is a bit spendy) and that's 524,288 /48s so no reason for me to not slap up a web page and see if I can earn back a few of the EUR I will be paying to RIPE. I'm glad people do it for the pittance we see here.