Congratulations, that is you. you are unlike most other people. and it is not because everyone other than you is dumb dumb.

It never says “buy” anywhere on any button.

true. it says “add to cart”, as if adding a non-consumable physical item, like a boxed DVD, to a shopping cart. then “continue to payment” and “estimated total price”.

steam is the least offender. other places do have buy buttons where buying does not result in owning.