> Wasn’t the link between high cholesterol and heart disease debunked in recent years? I had the impression that it was the excess carbs / sugars which are what causes health problems.

So did a lot of other people, some of whom were in good shape went on keto, and needed a bypass after not too long.

Total cholesterol isn't necessarily that predictive but non-LDL cholesterol/APOB are strong predictors of CVD