I worked on tax software and have seen these kind of efforts. Noble, yes. Short lived, yes. It’s relatively easy to make a free 1040 file. The real problem comes from all. The. Edge. Cases. 1) do you support xyz state? 2) what if I lived in multiple states? 3) what if i… And on and on. And it’s not just one and done. Every year IRS and states are changing their shit so you have to go thru and make all kind of updates…
Most countries don't tax expatriated citizens. Even with exemptions you still owe for social security and Medicare. It sounds good since many people will want pension in retirement, but Medicare offers vouchers or exemptions abroad. This was likely the precedence used for “historically, we do not offer any healthcare services to those abroad” when asked if overseas Americans would get access to the COVID-19 vaccine.