i wonder what makes you write such things. you dont even know the reference the artist used yet you advise to not change anything. its kind of liek someone joins a basketball club missing every shot and the trainer is like yeah your way of throwing looks really nice you dont need to score like every basketball player does since you jumpshot looks so graceful.
also impressionism came from the desire to draw nature and stuff - like you said - what you see but not distort them. while art usually was made as realistic as possible manet and his gang often met to draw outside on the fly because synthetic pigments were just invented allowing such things to do. with impressionalism color is the result from light and atmosphere reacting to each other.
like i mentioned in your other thread - where i explained how it cannot have a dark value being the prominent lightsource someone else even posted to disagree. whats there to disagree? its physics. its not opinions. to adapt the basketball reference its like someone telling you to snap your wrist more so you get a better shot but you be like nah im just into jumping and aiming; scoring doesnt interest me. dont worry im not doing these on your paintings anymore since you dont look into becoming better by knowledge but by producing. i can respect that and its all cool and i also understand if someone does not want to change a thing to the painting its not neccessary but it is kind of a blessing knowing what went wrong and why so you have more control over what you do in the future.
of course you dont have to only draw hollywood stars haha but here is the kicker : those fundamentals like light behaviour or perspective etc dont change for "not perfect" or even ugly people but light/ perspective etc can change if someone looks good or not
when i critique something even i take quite some time and re-check information i "think" i possess, try to imagine what the artist had in mind, how the artist processed the work and all that. its a good practise to strengthen my own knowledge and i often do paintovers as a warmup before going into painting myself. also - doing things correctly ( proportions, depth etc ) does not make you lose your style but enables you to play your style properly.
yeah tl;dr :
its ok to not change/ fix mistakes but imho its not ok to advice not to change/ fix mistakes because you just did art.