JimmyP Because if you’re going to brew as espresso, or as drip/any other percolation, it needs to work via that method & resulting higher extraction.
You also need to be more specific with the word ‘cupping’, the SCAA heavily formalised a cupping protocol (e.g. time in the roaster, ground colour on the Agtron scale, grind size, brew ratio & steep times, they have made a few, non-critical, changes since), but most people show no evidence of adhering to this and do whatever they feel like ‘in-house’. Even the SCAA standards are a bit of a mish-mash of pre existing works that they shoe-horned into a single recommendation.
Besides, cupping was innovated a hundred years prior to the SCAA’s existence and little in the way of documentation, nor specs remain beyond using 5oz rocks glasses and 7.3g of coffee. It was a diagnostic exercise to eliminate the risk associated with buying lots based purely on a promise and a handshake, it’s a QC for green buyers, not a ‘magic eye’ into production roasts.