And that ticket will be forever ignored. On the other hand, if there’s a TODO in the code, someone might fix it the next time they’re editing that part of the code.
A team that spends all its time grooming the backlog is not spending time on reading code, logs inputs, output, data etc.
We have fooled ourselves into thinking ticketing systems represent living documents but they don't - a high functioning team can have "hey I will fix the foobar by adding a cromulent adjutant" in a office (!) call or even an email.
A low functioning team knows no one will get round to fixing it