You're talking F1 here. LFS is mainly 'club racing'. By all means allow weather forecasts. But watch F1 - the most technological motorsport in the world, and even they get caught out by crosswinds, gusts, rain, drying etc. To have too much information on overlays and available will just distance LFS racing from real racing.
Now, I'm a purist in this regard, and I know a large proportion of the LFS community value 'fun' over 'ultimate realism'. I'm fully aware that attempting to recreate too much realism reduces the fun for everyone, purists and 'funists', but there comes a point where making reducing realism detracts from the very values that makes LFS fun.
The most I've heard about wind recently is with the LXCC league that I drive in. There have been a lot of people commenting negatively on the wind used in this league, and I really don't understand. It's a challenge. At the moment it's pretty much the same for everyone, and it requires extra skill.thought to overcome it.
But if we knew at all times what the wind was doing - 'Oh, I've got a tailwind of 14m/s, so I'll brake 5m earlier for this haripin' - then it just becomes a joke.
Even F1 drivers don't have such detailed information available to them. They get in the car knowing it's windy, and the rough direction of the main wind components, and they know some secluded parts of the track are going to be less windy/gusty than others. But they don't have real time information available to them. If there is a major change in the wind they might get a message over the radio, but nothing more. And that's at the peak of the sport. In, say, Caterham racing they just go out and cope.
I'd love forecasts. Especially when the weather system is enlarged. But some stuff has to remain a mystery, or we might as well just drive in bright, clear, windless conditions. Oh wait, everyone already does because it's easier.
I do wonder just how many people will bother with 6 lap sprints in rain bearing in mind people won't even have a bit of wind.