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I guess we'll find out when you tell us how the process went :)
You could try and get tricky and block bits of their app so that your return submission is sent but any response is blocked but you might just find that messes up your return. Depends how many fucks you give and how much time you want to invest. I've not seen the product so don't know what's possible - maybe their process will insist on having the old pedals plugged in and confirm their remote bricking, maybe they'll not even bother.
Maybe it's precautionary because they don't know if it was manufacturing fault or maybe they don't have to but it's legal waffle and they're trying to cover their asses if someone (else) possibly snaps one.
If they're offering a free replacement, I'd take it and if they brick the "possibly fatal death pedals of doom" then I'd take it on the chin (or not, as the case may be).
Even a 67kg person standing on a pedal that breaks could veer into oncoming traffic. You don't have to have hippy hero
wattsweight to kill yourself on a bike.