Tether is neither quick nor safe. It is a centralized altcoin that is extremely risky to use because it could be shut down at any moment very easily.
If you are happy with centralized tokens pegged to fiat then you can use PayPal. It gives you a token that is also called USD which is pegged with dollar and is fully centralized, fast and as safe as it gets.
Yes, but the money you move through Paypal include significant transaction fees. I think it's 3-5% per transaction, but I don't use it that often to pay attention. Everything you said about Tether is true, but the tokens moved via the Tron network bear almost no withdrawal fees. I am talking about withdrawing from exchanges. Therefore, it gets the job done as philipma1957 said. For now...