Presuming your group has a bard - one of the least played classes in the game.
If an average +2 on a skill check is breaking your game... well, that's not the game's problem.
Guidance: average +2, min +1.
BI: average +3 rising to +6, min +1.
Advantage: average +5, technically min +0.
Going from (say) +4 to +6 on a skill roll of DC 20, with advantage, means your roll target drops from 16 to 14, and your chance of success rises from only one in three (36%) to essentially even (49%). Getting the average benefit from these takes you from +4 to +9, giving you 70% odds of success.
Actually using the rolled values, rather than merely averages, increases things to 74%.
A fifth-level character with a total +4 bonus and but two sources of other bonus (doesn't have to be BI or
guidance in specific, those are just easy examples) turns a so-called "nearly impossible" check into something trivial.
Guidance is easy (all clerics and druids have it.) Getting even one other relatively minor random bonus isn't that hard either. An actual specialist (who, at level 5, may have a bonus as large as +11) would blow such a check out of the water.
Also, "least played"? Shoe me your data, or else your own dismissal applies just as much to you as it does to anyone: "your experience is not universal." I haven't seen anything to that effect,
ever. If anything, the haters seethe at the fact that Bard is as popular as it is!