The immense majority of subscription services go to great lengths to make it as easy as possible to get you on and too many go to great length to make it very hard to let you stop.
We are at the point where I believe there should be regulations that forces a company to make it as easy to stop as it is to join.
Also you named it: service. Not everything is a service, and not all services are required. While you can't easily avoid insurances, bankings, healthcare, internet/mobile provider you can easily avoid spotify, office365, netflix, evernote or telegram or a gym subscription.
> telegram
Not if important contacts are on there.
The point is, there is a clear trend. Various things we traditionally saw as "products" already morphed into services and I don't see any indication this will reverse in the near future.
On the contrary, with more devices becoming connected, the trend will likely increasingly include physical devices. See BMW's experiments with requiring subscriptions to use hardware you already own. See also the whole John Deere debate from a few years ago. Etc.
So while not technically impossible, it will become increasingly harder to not use services.
You can't rely on information from 3rd parties - those parties are under no obligation to tell you the truth, could be wrong or out of date