You can operate your own node (I do). Plus you are not up2date. Trampoline payments were recently introduced, and a client can insert several trampolines. So even if you use a hosted single upstream node, that node can not trace the target. BOLT12 which is currently finalized also hides recipients from invoices.
The thing about layer 2 solutions is, they evolve much faster than the base layer (bitcoin). So dont trust statements that are some years old.
I don't believe that is possible. If it were possible, it wouldn't be called a blindspot. Of course a mirror should be well adjusted, but I don't see how it substitutes for checking the blindspot. Try it in a driving test; you will fail the test.
Edit: does someone not realize that many (all?) the doctors and hospitals use to verify you is your name and date of birth (in the U.S. - although I suppose that's why since this breach happened elsewhere)?
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