Here is a scenario where the Platinum membership becomes palatable: If you are a family of four that book VIP tours four or five times a year, that alone will justify a Platinum membership.While both membership levels receive free room upgrades and lounge access at DL hotels, only the Platinum level of membership seems obviously geared towards the prototypical Disney nuclear family of husband, wife, and two kids.
VIP Tour: $275 an hour, six hour minimum = $1,650. You get five of them with a Platinum membership; so that's a value of $8,250 annually.
Four Premier Passes: 4 @ $750 = $3,000.
Right there that is $11,250. And even if you're really just interested in a standard Disneyland Premium AP, four of them would cost $2,000. That plus the $8,250 in VIP tours is over the 10k annual dues.
I don't know how many people book those tours, but those tour guides are out there every day with people. So at some level there is an audience out there. And yes, even though those things can be purchased individually, grouping them together and giving them Club 33 membership and a private new lounge could certainly incentivize those folks into joining and visiting the park more frequently and splurging a bit more.