Research consistently separates two things that sound alike. Perfectionistic striving — high standards, ambition, attention to detail — correlates with good performance and good wellbeing. Perfectionistic concerns — fear of mistakes, chronic doubt about one's own actions, sensitivity to criticism — correlate with anxiety, depression and burnout.
The second is the maladaptive half, and its signature is not effort but the absence of satisfaction. Top marks produce no joy, only temporary relief that this time it did not show. And relief does not accumulate.
The counterintuitive consequence is that maladaptive perfectionism lowers productivity. Fear of delivering something imperfect produces delay, delay produces time pressure, time pressure produces weaker work — which confirms the original fear.
Andrew Hill and Thomas Curran showed, in a 2017 meta-analysis, a significant rise in perfectionism among students between 1989 and 2016, particularly the “socially prescribed” form — the belief that others demand perfection.