The vast majority of Japanese and Mandarin speakers are also not in favour of replacing their current writing systems (which give them a link to thousands of years of their own history) in favour of simplified systems. I suspect it is the same for Arabic speakers.
Romaji/pinyin are widely used for typing the actual written scripts. They're not seen as alternate written scripts outside of edge case scenarios(like chats in FPS)
I generally agree with what you're saying, but there is rather famously a simplified form of chinese that was designed specifically to increase literacy rates.