Values is a tricky word (so tricky, in fact, that I think it would be reasonable to say that "values" aren't actually a real thing in the first place). I'm using it approximately to mean "things that you care about."

I want humanity to flourish and un-necessary suffering to end. But there's a limit to my caring energy, and I have to divide it between "universal utilitarian good" and "things I personally want for myself." Right now, UUG gets about 5-10% of my caring energy.

I would take a pill that increased UUG to getting 15-20% of my caring energy. (And in real life, this takes the form of investing myself in altruist communities, which reinforces my self-image as someone who does good things). But I honestly don't have interest in becoming 100% altruist.

Part of me wants to be able to say "I'd take a pill that makes me 100% altruist, so that I only feel motivation to do the bare minimum of selfish-things to survive, and otherwise direct my energy to whatever accomplishes the most good." It's a nice thought to believe that about myself. But it's not true. (If I became 5% more altruist, I might want to become an additional 5% more altruist, and maybe the cycle would repeated. Not sure. But if I got to take exactly one pill and then there would be no more pills after, I don't think I'd choose to become more than 50% altruist).

One related thing I would have benefited from in the past (and possibly still would) is being more honest about how difficult it would be to put my values into practice.

That is also important, and slightly different.