The comparison to art works was not mine to begin with. And if this is not a good comparison , neither is "antiques". Serious collectors of instruments do have them cleaned, but they are done correctly, (not to make them look "pretty", but to make them work properly). I've seen old Grecian cymbals from the bronze age that probably should be left green, & have "collectible value beyond practical use", but I think usable cymbals should be clean. ("To clean or not to clean" seems to get confused w/ cleaning properly). I've never had a cymbal sound worse after cleaning, & have always noted an improvement.
Most vintage cymbals in use by professionals drummers, including my son, do not have their patina removed. This is generally purposeful and not a result of laziness. The overwhelming number of vintage cymbals available for sale are not shiny. Many, many posts of owners of vintage cymbals who have removed the patina and regretted the change in sound afterwards can be seen on a variety of drum and cymbal sites. Clean them if you want, they're your cymbals after all. But most drummers, especially older ones with extensive experience with true vintage cymbals will avoid it..