No real benefit in voting on it now, other than to express your added desire for a thing the TS team already knows people want.
Languages are used by people. So it depends, a lot, on the goals of the stewards of a language. Votes can be a useful signal for whether or not people are going to care about your language enough to adopt it.
... but it's absolutely true that voters can vote for the moon and then skip off blissfully, never having to worry about how you implement the Apollo project.
It is valuable feedback though.
I definitely hate chains of guards to get at a nested property.
[1]: https://docs.microsoft.com/en-us/dotnet/csharp/language-refe...