I would agree that this article overstates a lot of things.
ApoB is still a reasonable thing to check though, at least once - Lp(a) is the primary cause of atherogenic particle counts being high when LDL-C isn't the culprit, and it's usually a genetic factor. Having a high Lp(a) will bounce your ApoB up and give you a better understanding of the total atherogenic particle load. You could have fine LDL-C or Lp(a) on their own but the total amount could be enough to be worrisome.
Lp(a) being problematic is definitely less common than it being more or less fine, but it's certainly not incredibly rare, either.
ApoB is still a reasonable thing to check though, at least once - Lp(a) is the primary cause of atherogenic particle counts being high when LDL-C isn't the culprit, and it's usually a genetic factor. Having a high Lp(a) will bounce your ApoB up and give you a better understanding of the total atherogenic particle load. You could have fine LDL-C or Lp(a) on their own but the total amount could be enough to be worrisome.
Lp(a) being problematic is definitely less common than it being more or less fine, but it's certainly not incredibly rare, either.