It’s not only about high mileage bikes that will suffer from worn or damaged discs but today’s sports bikes can suffer just as badly if regularly used to the limits of their design. Trackdays are killers of discs as constant hard braking exaggerates wear and tear leads to excessive heat build-up and can cause discs to warp.
Sight , feel are just an important thing in deciding whether a disc is damaged or not,if you can feel a pulsing sensation through the front brake lever or rear under gentle braking, or the front end violently judders at high speed with the first stroke of the lever then it is a sign that discs are warped. But get the steering head bearings checked too, drive safe...

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