Meanwhile Spotify gives you, what, playlist creations?

Distribution is hardly free. There are massive overheads - do you know all the details of sales tax law in your own country? What about in hundreds of other countries? They're all different. And what about refund laws? That's also different in each country. If someone writes you an email in a language you don't even recognise... do you just ignore it? To give one example in my country if a customer asks for a tax receipt after a purchase, you are required by law to give it to them. That's hard to comply if you don't speak the same language as the customer. Spotify handles all those headaches for you.

What if your bank tells you they have refunded the payment someone made to buy your album, pending an investigation into wether or not the cardholder actually authorised the payment and received what was advertised. Can you prove it wasn't a stolen card? Can you prove the album was delivered to the customer? The bank isn't going to do that for you - they're happy to just refund the payment (and might charge the seller a $50 processing fee...). Spotify is able to provide proof and will fight people who demand unreasonable refunds. You probably can't prove it, which means anyone who wants a free album can just buy it and complain to their bank. And trust me, it will happen. Might not even be your customers asking for refunds - it might be a rival band that wants you to suffer. If there are too many refunds, the bank will just take way your ability to sell stuff.