hi tom
what does sharpness have to do with justification of large size or quality control, amateurism or attention to technical details ?
i don't really see any connection, except for people who wish there was a connection.
I think anybody on this forum can tell if something like soft focus was intentional or not, or even if it was not intentional, but a conscious decision to go ahead with the image. People have to have some standards for themselves and their work.
I realize standards are subjective and if a person wants to perpetrate a lack of skill as an artistic merit, than so be it. Who am I to argue.
Any photographer I know however, and I know quite a few, will have a problem if an image is distracting because of some obvious useless flaw or bad editing, and they will move on to something more interesting.
Photography is an exercise in control over a variety of factors. Most photographers who are creative will not be so easily fooled if another photographer does not demonstrate at least an honest attempt to control those factors in their imagery. This would include choosing the most pleasing combination of sharpness, image size, camera format, film grain, print contrast, etc., etc., to maximize what it is they are trying to say and to make whatever statement in the clearest of ways without dumb distractions like technical flaws that are out of place. Decisions are less effective if they are arbitrary.
This is not an argument of amateur photographer vs pro photographer, but one of first-rate imagery vs. some that is not so much.
This not to say every image has to be any certain way, but every image should be interesting. Distractions make them much less interesting. It's kind of like the idea of suspension of disbelief in movies...if the story is unbelievable, or the movie is poorly edited, or the film breaks.... the film is doomed to failure.