Maybe my definition of periodization is different than Jon's but I would argue included in the definition of periodization is "how often/frequent you do what you do"
Say for rock climbing... I would argue (and could totally be wrong) how many times a day/week/month/cycle/etc you:
Work power vs endurance vs power endurance vs strength vs etc etc
by doing
redpoint attempts vs traversing for 30 minutes vs 4x4s vs system boards vs HIT strips vs frenchies vs etc etc
is dictated by what you are training for whether it be
the nose in a day or midnight lightening or etc etc
Each goal and each climber is going to do a different workout to achieve the readiness needed. This IMO is periodization and IMO everyone benefits from it assuming they are programming their training regiment correctly.
And yeah: blood, sweat, tears and occasionally puke