The key word of the question that made me lean towards "no" was the word "forced." Anyone forced into counseling after a trauma is in a different mindset than someone who willingly and desirably chooses to get help after trauma. Someone forced will most likely enter into counseling with a negative and resistant mindset and won't be as receptive to the help.
I believe if I had received loving support and help after my trauma, and then encouraged to get counseling and supported during that time, the outcome might have been different for me. I can't say that I never would have developed PTSD, but maybe it wouldn't be as severe if I'd had support?
I know there are risk factors that can make some more susceptible to PTSD after a trauma than others, so who's to say that someone who received counseling immediately after a trauma and didn't develop PTSD was ever going to? Hard to say.
I had delayed onset PTSD, where my trauma happened during childhood, was compartmentalized for 15 years, and then triggered during the traumatic birth of my second daughter. So I'm 36, and have now been dealing with severe PTSD symptoms of my childhood trauma for the last five years. I never had symptoms following the trauma, and WAS forced into counseling at 14 years of age (and though they were full of sh--), and one psychologist in particular traumatized me even more so that didn't help!
So long story short (I know, too late), I guess I don't think it's preventable. If you're going to get it, you're going to get it, but hopefully you allow yourself to get help right away.