My older two have been dressing themselves since they were three.
My middle guy is four and a half. He has a mane of Dreadlocks started...So getting a shirt pulled over his head can sometimes be a challenge.....but it is hilarious to watch him struggle.
My youngest is three...and has Special needs(SPD,OdD,HFA)....He just started doing him self in the last three months....This is an amazing concept we didnt think he would catch on until he was WAY older..so a milestone hit when it needed to hit.
Now he is tickled when he gets himself dressed...even if he is backwards and on the wrong feet...That is how I allow him to go...
I think with him since he is Special needs ''Fixing him'' would only knock him off that emotional high he gets when he is finished. You can feel the pride beaming off of him.
With my older who is in 1st gets finished getting dressed...I DO fix him up...because If I tried to send him scraggly he would tell me about it when he got home.
''MOM, we didnt comb my hair!!''...''MOM, I had PEANUT BUTTER ON MY FACE''
It is a good thing I can mute his whining:)
I think it is human nature...to come after your kiddo and straighten them up...We are after all running in instinct...Grooming is an instinct....