140 TPS is still hopelessly short of what is necessary to achieve the laughable pipe-dream of running a sizable exchange economy on native Bitcoin.
140 tps is 3x greater than PayPal and about 10x the FedWire (US Bank wire network) system.
I use PayPal maybe a dozen times per year and wire money once every few years. I use cash and/or my debit card and/or my credit card VASTLY more often. Probably I am not atypical in this.
So, your examples are specialized 'exchange' examples which don't map well to the real world.
More importantly, I already have a plethora of solutions for real-world exchange duty that work quite well for me (PayPal, Visa, ACH, etc.) Yes, they all can (and do) act as monitors to keep an eye on me. I have no need for yet another if Bitcoin becomes the same basic solution, and there is zero doubt in my mind that that is exactly what will happen as a prerequisite for Bitcoin to function in a high-capacity mode.
A 'sidechains' scenario with Bitcoin freezing in it's current tight and defensible form offers me the best of all worlds. I can use spy-chains when I don't care, spy-less chains when I do, micro-payment chains when I want to tip someone, and current defensible Bitcoin as a trusted deep-storage solution.