You're calling an article 'useless' because you have to open it to know the unit? That's pretty extreme.
Would you be complaining if it was "Texas Power Prices Spike Amid Scorching Heat"? Or "Texas Power Prices Max Out Amid Scorching Heat"? I think both those titles are fine, and they give about the same amount of information.
If you want to say the number inside the headline is useless, I won't argue.
But you were agreeing with a claim that the headline itself was useless. That's not the same thing.
If the headline was useful without the number, which you seem to agree with[1], then the headline is still useful with the number. It's like adding an extra filler word to a sentence. The word is useless, but it doesn't ruin the sentence it's inside of.
[1] Note that the original headline already had qualitative information, and made it clear that this number was unusually high. It's not qualitative vs. quantitative, it's qualitative vs. both.
Would you be complaining if it was "Texas Power Prices Spike Amid Scorching Heat"? Or "Texas Power Prices Max Out Amid Scorching Heat"? I think both those titles are fine, and they give about the same amount of information.