Ever since the start of the 30% take, people who have complained about it always sound like they have no experience on the business side of things. For that 30%, you get a canned marketplace, with all the financials and fiddly bits done for you (as you say). A 70% take as a producer of goods is very high for a manufacturer that doesn't own the distribution channel.

Also FTA: At $70K in net revenues per year, your spouse could be telling you to get a day job.

"Don't you want me to be happy, doing what I love?". I mean, if we're manufacturing convenient numbers to make an argument, let's also look at all the reasons why someone would want to be self-employed as a developer. :)