The issue, as is so often the case, is not wit the tool - in this case, telephone appointments - but with how it is used.
With our GP, telephone appointments are fantastic. You are usually given a window of an hour - which, if you were in a sort of job where you can't just take the call spontaneously would be a similar amount of time you'd need to take off to go and see a doctor, maybe less, so that seems reasonable.
They are almost always for fairly routine, easy things. I had one recently regarding a UTI - antibiotics were prescribed and I was asked to drop a sample in. I also had one as an initial conversation regarding potentially going on HRT, after which I was asked to come in for blood test and a referral to see a specialist was made.
On the other hand, repeated stomach pain for DD - they asked us to come in.
Similarly, I can fill in an online form for all sorts of things that then get sorted and I'm informed by text of the outcome - eg meds not working right, new prescription with different meds are sent out.
But then you get surgeries insisting on telephone appointments when you've called to ask for an appointment because of a potentially infected insect bite or who insist on a 5 hour window. That is pointless and completely defeats the purpose.