I think it does make a good point though. The intellect devourer is certainly not the only thing that's horrific/disgusting in the game.
I really think it's pretty consistent with the tone of other parts of the game. Some people will react to some parts more than other parts, I imagine. However, if you're not prepared to feel a somewhat disgusted or horrified during some scenes of the game then I think it's best that you sit this one out. There's no reason to believe it won't get worse at some point later in the game.