Bloggs, in the air an aircraft yaws; on the ground it turns relative to a ground reference - wheels.
Being either in the air or on the ground, an aircraft can translate laterally due to wind side force, this is ‘very relative’ to the edge of runway.
Certification requirements specify the conditions when the crosswind is to be published as a limit; this is rarely used. Certification is not an absolute science, more probability; in addition we might be surprised by the influence that the operating industry has had on the ‘need’ for max demonstrated.
Defining personal limits is a very good safety policy, but not to forget that changes should only be considered after evaluation of landings experienced and not that just before landing.
