I was having a hard time understanding what you were getting at, which is why I said what it seemed like you were saying. I wasn't ignoring anything.
No you ignored it by not answering the question about consequences.
They can't matter for a lot more reason than that.Skill gaps in 5e don't matter much by RAW due to bounded accuracy and low DCs, which is why I've brought back trained vs. untrained. Proficiency matters, even if the untrained PC has a higher bonus due to stats.
Princess/vip target to save is harmed or killed by a skill gap?.. that's going to maybe make some NPCs not like the party or even give them trouble sure... so what? The PCs don't need anything from the world beyond starting gear by design and the only gear hurdle is a one and done thing once they have magic weapons.
Terrible ritual goes off kick starting some apocalypse because of a skill gap? Again... so what? The game is designed so sleeping six hours in a ditch in the rain is no different from spending a month in the emperor's palatial honeymoon suites with an army of servants catering to every need... so what if the apocalypse starts, MOAR content to kill is closed now and if it's bad enough the players can even shrug off snt ill will caused by letting the princess die or get injured in the ritual they couldn't stop.
5e is designed to cater to the exclusive needs of a very bizarre white room of a tiny group who must have full skill coverage without trying and must never resort to plugging critical gaps with magic items or adventuring around them. It makes skill gaps in a good sized group to be nearly impossible and completely irrelevant when they happen.