It is a problem...
Don't forget though, if someone has uncontrolled PTSD and they haven't healed their trauma and really minimised their symptoms through learning all the techniques relevant to dealing with PTSD... then valium is not the solution, because the dosage would be too high to sustain.
For example, someone who has PTSD and refuses to really fix themselves for the majority of the problems and symptoms, then valium will not work long term, because the dosage would be too high and valium in high doses has major issues...
The use of valium will only work IF you have done a good amount of work already, got yourself quite stable, yet still suffering bouts of anxiety and depression, yet are still manageable by yourself... then low dose valium will do far better than SSRI's, as the valium takes that edge of the anxiety / removes it, thus gets rid of the depression, without the issue of the problems that can occur with higher doses of valium.
Saying that, there are other drugs out there for those suffering more daily, than SSRI's, that treat the anxiety and not the depression.
Medicine moved to SSRI's and SNRI's because they gave the least side effects than previous medications, being MAOI's and Benzo's, however; they also have raised new issues at the same time.
Every single person is really a trial and error approach with any type of medication. For some, SSRI's will work perfectly. Some may require SNRI's. Some may require older drug labels because their bodies and/or symptoms of SSRI's and SNRI's just don't play nice together, which for PTSD seems to be a good majority of people, contrary to physicians beliefs.
We fortunately have some PTSD experts close to us, and some good doctors who use lots of commonsense, so they aren't focused on just one type of medication or another, instead they are willing to trial different drugs.
If you take a pill and it starts making you ill, I'm sorry, but doctors theories on just keep taking it and then up the dose, isn't going to make it better, issues will still be present.
You're better off to shut them down the moment a new drug gives you issues, and try the next option, until you find a drug that is right for your system uniquely and gives the the results you need with the least issues.
With a little effort on a physicians part, and time, there is a drug they could match correctly to every person through trial and error... but ignorance is not helping when their solution is to just up the dose, up the dose, up the dose, or now add another med to counter a major symptom being presented by a drug. Taking a drug to counter a side effect of another drug is not a real commonsense solution for the patient IMHO.
Instead, that screams arrogance and ignorance from the treating physician in my eyes. Or "Doctors Syndrome", I'm right, you're wrong, end of story... I know your body better than you know it mentality.