How about the idea that some anecdotes are better than others.
E.g. "Anecdotal, but I took paracetamol and found it wasn't helpful for my pain. So I don't think it works."
There's an anecdote for you, maybe you should stop taking paracetamol now. By your logic no one can discuss, analyse, or point out it any potential issues with it.
And btw my stance is that the electrotherapy is interesting and plausibly could help. But tendonitis issues can heal with 6 weeks of basically rest, and that should be acknowledged in the discussion. (12 weeks in total, including the 6 weeks with a PT.)