Please read what you quoted carefully. The person you quoted wasn't saying they valued Alaska higher, they were saying The Points Guy (as linked) did. The person you quoted said they didn't value any airline miles higher than 1.87, then gave The Points Guy link to show that TPG felt about the same (with TPG having the Alaska exception).

So your question is for The Points Guy, not for the person you were replying to.

Since you're based in PDX, aren't you familiar with the Alaska program? It has slightly lower miles requirements for many routes than AA/UA/DL. However, it has a redemption requirement of only one partner per redemption, which makes it harder to use for people not in a city served by Alaska.