And about people that "enjoy" these older art forms (fine literature, classical music, fine art, older popular music, etc.), if it isn't aficionados then who is enjoying them? Certainly not most mainstream audiences. If aficionados aren't the ones that enjoy these art forms, then tell me who does.
The fact is that classical music is not a popular art, neither is older cinema (or arthouse cinema), nor are the fine arts.
Classic FM, the biggest classical music only radio station in the UK, has a weekly listenership of about 6 million and an annual turnover of around $35m. This represents nearly 9% of the entire UK population, are you saying that 9% of the UK population are classical music aficionados? If so, what percentage of the population would you say are aficionados of old film? The Sistine Chapel quoted by the OP has about 20,000 visitors a day (5m a year) who are willing to brave the legendary queues and pay about $19 each for the privilege. Classical music is not as popular or popular music and fine art may not be as popular as other contemporary artistic media but "the fact is" that they are still popular with the general (mainstream) public, not just aficionados (!) and are still large global industries.
Furthermore, old classical music and old fine art are still at least as, if not considerably more "popular" than contemporary classical music/fine art. I wonder how many members of the public know the names Bach, Mozart or Beethoven and how many living classical music composers the public could name without using google? What about Michelangelo, Da Vinci or Van Gogh compared to living painters? Turn that question to film, how many know the names of Lang, Renoir, Capra, Ford or even Chaplin compared to say Spielberg, Tarantino or Cameron?
Pavarotti (a performer of old classical music) had huge global recognition and made a personal fortune estimated at nearly half a billion dollars, where is the comparison with recent filmmakers of old or arthouse films? How many cinemas, dedicated to only screening old films, are there in the world, how big of a global industry is it? Compared to soccer, basketball is a niche sport as is Tossing the Caber but just because these two sports can be described as niche doesn't mean there are any useful comparisons between them. Your comparison between old film and old classical music/painting just make no logical sense either in terms of their popularity, who preserves and enjoys them or in terms of finance/business.
It's fine that you have personal biases and fine if you want to let those biases affect your filmmaking. It's not fine however to let your biases lead you into misrepresenting facts and making spurious comparisons! I'm not saying silent and early films shouldn't be preserved, they absolutely should, but currently at least they need to be preserved for the sake of film history, film historians, academics and a few relatively extreme film buffs, not because there is a significant commercial public demand to see them.
Perhaps since you are so concerned about the development of technology in cinema (which is only ONE aspect of cinema), you are unable to see why people appreciate older films.
Technology may only be one aspect of cinema but it is the aspect upon which all the other aspects of cinema are based. If you want eschew technology and make silent films with a hand-cranked Parvo no one is stopping you but good luck screening your film without more advanced technology!
G