I've never had to agree to multiple contracts per day - I'm sure that's true for some people but I doubt it's common. And there is rarely, if ever, a ticking clock regarding accepting software terms of service. People could easily
make time to read the terms if they wanted to, it isn't unworkable, they click without reading the terms because they just don't want to put in even the minimum amount of effort.
It's just like everyone suddenly being shocked and surprised that social media companies have the right to ban their accounts and moderate their content for any reason. That was in the contract you agreed to when you made an account.
This is not to excuse Adobe, their tactics here are vile, but pretending contracts don't really exist just because you don't read them even when you sign them is a childish way of thinking.
Companies get away with things like this because consumers have normalized never reading terms of service as acceptable behavior. If they did read the terms, they might see how bad they are, and not use the product. It would be easier for competitors to compete on their quality of service rather than the superficial things consumers do notice like name recognition and aesthetics. There would be some market pressure to prefer honest contracts over dishonest ones. As it is, there is no such pressure from consumers, only regulation.
And even with regulation against dark patterns like the ones Adobe is engaging in, the consumer is still responsible for their own actions. Signing a contract without reading the terms is never going to get you off the hook, at least not in the US. The answer is to educate and empower people to be proactive, not to excuse and normalize their apathy.