Not in the way people here use the term. Many good looking people that are allowed to post here claim to be mentalcels, they say they can't get laid because "autism" or "social anxiety". But those people can escape inceldom whenever they wish to, if we assume they are not LARPERS which is very often the case.
Being a true incel for a very long time however, will have effects on your mental state and social skills. Loneliness and depression makes your iq drop dramatically and those are feelings only ugly people are going to have.
But of course fakecels here gonna claim mentalcels exist in order to justify themselves posting in a community they do not belong into