Look, I understand the hate against terms and conditions. They're not a lot of fun. But the alternative is worse. Let's imagine a world where terms and conditions don't apply;
Firstly, businesses can do whatever they like. There are no terms to agree to. They simply function in whatever way they "consider to be valid". If a customer disagrees with what is valid or not, hey, that's what courts are for. And given there's no agreement between business and customer, who's to say who is right?
The business can equally terminate you as a customer, with no notice, for no reason, at any time. They can delete all your data. They can spam your contact list. (Ok, they do all that already, but you know what I mean.)
Secondly, customers can do whatever they like. They payed their $9.95. They can do whatever they like. Sure, sharing logins is fine (if they "consider that valid".) They can abuse the system, scrape data out and resell it, anything goes. And of course the only recourse is back to the courts. Which is ultimately no recourse at all.
Even your analogy to parking breaks down. Should you have to prove legal residency to park? Should I be able to park a car on the street (unmoved) for a year? Should I be allowed to park next to a fire-hydrant? Can I park it in the middle of the road? Can my neighbor "reserve" his parking space using an orange cone? Clearly there's a lot more to parking a car than "I should be able to park".
T&C might not be fun, and you may not agree with them (hint: if you don't, then don't use the service) but they at least set out the business behavior that you can expect. Read them, don't read them, that's up to you. But don't complain that the fault is on them when they do something that are in the T&Cs.
And yes, I get they're one sided. customers never bother to submit their own T&C's so they're not fairly represented. Again, that's on you for using that service.