I agree with you. Yes all data has value, power, pace and heart rate.

But you seem to think I'm saying heart rate is better than power which I'm not. You also seem to think I'm saying heart rate tells you how hard I'm pushing on the pedals which I'm not.

If I had to choose between power or heart rate I would choose power. But I'm saying I prefer to look at power and heart rate.

You mentioned above how your heart rate is affected by the swim etc etc, I don't disagree with you. It is the way heart rate varies alongside power that is of interest.

We agree though that we would not put heart rate above power.

We agree all data has value. I'm advocating not ignoring heart rate alongside power not that heart rate is a superior alternative. If I could look at blood lactate alongside power I would look at that too.