It validates that governments can see what's happening on Telegram, and that makes Telegram a target.
They can't go after the likes of Signal because they have very little to go on in the first place. They can't say definitively what's happening there as they can't see any messages. Unlike Telegram.
It's not a conspiracy that Signal are compromised, so they're being ignored. They're being ignored because there's nothing to see, so governments might as well spend resources going after the apps where information is visible instead. At least they might get a result. E2EE apps are too difficult.
Does it matter? Ultimately, these are estimates. Educated, data backed estimates, but still estimates.
One larger than expected volcanic eruption, coral reefs dying faster than expected, whatever, all it takes is one or two things to not go the way they're expected and everything speeds up.
20 years or 25 years, the point is we're all kinda fucked unless we do something about it.
What we need to do has been and will continue to be debated ad nauseam, but we know we must do something.