People can’t fathom reasons why not to write a web app except there are many: the web is slow and bloated. There are tons of security issues with putting your key in your browser. Noone installs PWAs except nerds. I don’t know why people are upset because I’m not writing a web app when there are like 10 nostr web apps. People should go use those if the web is so good. I much prefer native non-web-stack solutions that still work inside browsers. I am already building one of those.

You are spot on. Web Apps are good in some situations, horrible in others. Yes, you can make anything run on almost anything, but with web platform it's going to be more pain (not always). Ignore the noise, it's coming from people in the process of learning...