not at all. We should research what the actual question should be. e.g. Does physio give someone a faster and more productive recover and return to normal activities of daily life and work in a faster time frame to another technique or therapy or doing nothing. Who cares if everyone is about the same 12 months or 2 years later. By then they have lost their job, their spouse, their enthusiasm for life.......

Yes we should research what we prove "empirically" to be correct and we should positively affirm the fact, for if we prove it to be false then that would be extremly powerful. AFter all that is what an RCT should be used for.