People give you a thing they want to improve on because they have to come up with something for reviews. Needing to improve on technical writing is innocuous,

People give you a thing they want to improve on because they have to come up with something for reviews. Needing to improve on technical writing is innocuous, nobody really cares about it when making decisions about hiring or promotions or layoffs. You asked them 'what are your biggest weaknesses' and they said 'I care too much'.