Jen, as most have said already, break-in guidelines are more for protection of the manufacturer than the consumer. I agree that it makes sense to follow them if only to avoid nasty surprises should you encounter an issue with the engine on your new bike.
I think what you are remembering about break-in rules dates to many years ago (back when I was a young rider 😕) when the machining and clearance specs were not as well controlled and consistent as they are now. The mantra was to run the engine at less than WOT and especially, to vary the RPM for the first few 100s of miles. Theory is (was?) that under closed throttle/deceleration conditions, the engine created a high vacuum in the combustion chamber which helped "draw" oil up the cylinder walls, lubricating the piston(s) and upper cylinder(s) and thus, ensuring break-in without damaging the bores. The more precise machining in modern engines coupled with metallurgical advances and the fact that many manufacturers use a Nikasil coating for the bores has kind of made the old rules unnecessary. The other point is that modern motorcycles all have an ECU that likely records events like throttle plate position, over-revs, pre-detonation, coolant and exhaust temperatures, and a few other data points that could be used against you in a warranty claim.
Likelihood is that you could probably "run it like you stole it" and nothing bad would happen, but this way, you get to enjoy the anticipation of that first WFO blast to redline when you hit the magic number!