For Meds
1) One nerve compression can often set up a cyclical reaction to pain. . .ie muscle spasm. . .more pain. . more muscle spasm, which can sometimes lead to a complex regional pain syndrome where the whole pain problem spirals. Medication can help break that cycle and if the initial problem is not trauma, possibly can treat and cure.
2) if inflammation is part of the pain certain drugs can help immediately. I would add that in my experience this has more to do with low back pain than pelvic, although it must be true of some peoples pelvic problems.
3) I think that if someone is truly entrapped the 'damage is done' and so meds can allow that person to 'have a life"
However side effects, with drawl symptoms and addiction all have to be weighed up and assessed against the positive effects of medication. It's all a bit of an experiment, but like you am not pain free.
I know what you mean about maybe doing too much because the medication can allow you too also Piasma. . .. I have been taking Lyrica/Pregabalin for the last 3 months or so and found (eventually) that they did work, BUT in fact they work too well. This medication has allowed me to sleep in any position rather than my contrived sleeping on front with fist under pelvis for support and one leg bent and raised, frog like (very wierd I know, but it works (ish)

)
With Lyrica I found myself waking up on my back

and I was over the moon as had been used to staring in the mirror in despair at my squashed up face every morning pre Lyrica. Unfortunately my piriformis muscles/pelvis must
need that extra pelvic support my contrived sleeping position gave me as they became
massively more painful. Other muscles then tried to join in. . .even as far as my upper back between the shoulder blades. . it has taken around 2 weeks to calm the whole thing down. I have stopped taking Lyrica altogether.
Fall 2008. Misdiagnosed with lumber spine problem. MRN June 2010 indicated pudendal entrapment at Alcocks canal. Diagnosed with complex variant piriformis syndrome with sciatic, pudendal and gluteal entrapment's by Dr Filler 2010.Guided piriformis botox injection 2011 Bristol. 2013, Nerve conduction test positive; new spinal MRI scan negative, so diagnosed for the 4th time with pelvic nerve entrapment, now recognised as Sciatic, pudendal, PFCN and cluneal nerves at piriformis level.