At this point we have to assume they're doing it for attention. I refuse to believe a team of people that can ship an OS, even if it's just a riced Arch, cannot figure out acme.sh. Come on...
Weather agencies funded by taxes should make their data available to everyone, since it’s the public that finances them. Luckily, that’s already the case where I live, but when I travel I have to rely on global sources like Open-Meteo, which are usually less accurate than local ones. Another open (and global) alternative would be great.
If a weather app is going to be truly useful, it usually needs a lot of permissions, like access to your location all the time, notifications, etc., and I don’t feel comfortable giving a proprietary app that kind of access, especially when there are great FOSS alternatives.