That is why the rules should have empowered the adventure writer or DM to vary the rest durations
for each adventure in the same campaign with the exact same heroes.
The PHB could still have presented 1 hour and 8 hours as the assumed default. When the DMG and the DM doesn't say otherwise.
Point is: just changing it to five minutes/1 hour fixes nothing. Likewise, setting it to 1 day/1 week does not help.
The only true fix (apart from completely changing the mechanism, see "Encounter Points" for example) is to accept that for one adventure a 5 minute short rest is perfect, but for another its 1 day.
I predict that just as D&D has dragged the conservative naysayers screaming and kicking into the modern world so many times before*, it will happen again
*) remember when there were alignment restrictions on class, level restrictions on race, Hats of Non-Detection, months-long Charm Person spells, ten-round pre-combat buff parties, scry and teleport slaughters...? You shudder too? Ayep, the day will come when D&Ders will scratch their heads wondering why it took so many editions before the fixed rest sacred cow was slaughtered too.