This is absolutely, completely false. Apple devices do not come subscribed to things that will charge you if you don’t cancel. Don’t be silly.
That’s fine and normal, but what’s not as normal is that there’s no way to turn off auto-renew and keep your trial period. You either decide to cancel now and lose the rest of the trial or you’ve got to set a reminder to cancel.
The thing is, at different points Apple has offered free subscriptions between 3-12 months depending on their promotion. So it’s a pretty enticing trial depending on what’s being offered.