I meant that if they both record, the person with the better sound quality, BGM, flow, etc. will win regardless of the lyrics. It would make writing barely even important.
This isn't true at all. Your delivery is a huge part of it, but if your lyrics are ass then your rap isn't good. It comes down to whoever has the better rap overall, and lyrics and delivery are both incredibly important. You can't really get by on just one if your opponent is capable of delivering both (which every person should be capable of.)