I don’t think that’s pedantic whatsoever in this context. Words matter from politicians, especially when they have teams of speechwriters, and she’s not exactly Ms. Progressive. She’s promised to fight against 10% of it, and it’s totally valid to want her to clarify her intent.
Y’all know decimate was the headline and this was the actual statement, right?
I will do everything in my power to unite the Democratic Party — and unite our nation— to defeat Donald Trump and his extreme Project 2025 agenda.
Regardless, the “pedantic” argument against the headline is only a thing if you’re not allowing for the evolution of language, it’s actually just being a snooty language snob given that language does evolve and the usage of the headline aligns with common standards these days:
Decimate strayed from its “tenth” meaning and nowadays refers to the act of destroying or hurting something in great numbers.
See also definition 3b of the same source.
When you look at her voting record in the Senate, she’s fairly progressive (as far as US politics goes). IIRC, she’s a little to the right of Sanders, and a little to the left of Warren, but pretty close overall to both of them. That said, she’s more of a pragmatist, and Sanders is an idealist.