I did this the other day. I got 2 commendations.
They enjoyed it. I didn't get 3 commendations because I joined with someone.
Not every fight can be solo Tanked by an under-geared tank it takes some skill. Not as much as it used to with all the self-heals Warriors has now but it still has some.
Finally, why not flex? It's one of the few times you can feel really good about the job you chose to play.
DPS I can do big numbers CHEER ME.
Who cares if you can do big numbers if you die 1-5 times in a fight those big numbers are gone.
The fix is a few Tankbusters and Group soak, That overpower a tank's self heals.