Sincerely, as Spotify (and the rest of the streaming services) are forced to make more and more user-hostile decisions to keep their revenue growth curve going up and to the right, it might make sense to jump ship early.
If you don't participate in promotion on social media for your art or business, there is absolutely no contact with new customers unless you run a brick and mortar or maybe rent billboards.
In order to monetize streams on your own personal web site you'd likely need to run ads, charge for user accounts, and/or generate paid memberships, which is harder than pulling teeth even as a well known musician.
While, on the other hand the business could sell their products on their website and therefore get 100% of the money on their website. Many companies sell on their website for this reason.
And then they also need to deal with all the crap that this entails.