Fair point, it's categorically true that no critic watches every single movie released and I definitely overstated that. A brief search on Statista indicates that about 700 movies are released a year, the average American sees 2.3 movies a year (in theaters), and professional critics review over 200 movies a year, some even review 300.

I maintain that given this disparity (2.3 movies a year versus 200 a year) my point still stands, critics will tend to watch movies regardless of any predisposition towards them whereas an audience member will be much more discriminating about which 2.3 movies they will pay to see.

I used to be a better professional film critic, mostly festival movies.

movie critics do watch the best movies. eg on a festival with 100-250 movies they watch from 30 to 50 typically. from these 30-50 there are about 20 good movies, the best movies of the year. from these regular moviegoers watch 1-2. normal people do not watch the best but the worst with the biggest ad budget.

of course critics don't watch every trash movie which starts every week. from 5-8 filmstarts per week, they watch 1-3. these weeks more, around 3, because now we have the best weeks of the year, with last year's Cannes movies arriving. and then again late fall, with the best Oscar movies being pushed. but eg this year's Oscars had only 2 good movies overall.

for comparison: my letterboxd https://letterboxd.com/rurban/films/diary/