You're PC is in tier 4 with a lovely +11 to a Strength ability check (your considerate DM is allowing your +6 Athletics proficiency bonus to apply to lifting that fallen 20' statue off of your ally! Such a nice DM...

).
The task is DC 30,
Nearly Impossible (horrible DM! Why a 30!?

), as the statue weighs several tons.
You need a 19 or 20 to succeed, allowing you just a 10% chance of pulling it off.
But, you're the best you can be! Only those pesky rogues or bards can typically be better (darn
expertise!). How can YOU have just a 10% chance. You're a hero, master of the realm, a "superhero" even, if you will...
Disappointed, you roll the d20 and get a 15, missed it by quite a bit. The DM tells you the ally fails a death save automatically (being crushed by a 20-foot statue can do that...).
You try again, an 11! It is getting worse! Another failed death save...
Last chance! An 18!?!? Oh, missed it BY ONE POINT! "
Come on, DM, give me a break," you cry out, "
I was just one point away!"
The DM grins, "
Well, ok, you succeed but with a setback," as he rolls on the Lingering Injury table, "
You've suffered internal injuries from the strain, oh, and a level of exhaustion."
So, the above scenario... Even with three attempts, your chances of getting that 19 or 20 is a bit over 27%, or about 73% you will fail. Sure, it is nearly impossible, but you are what you are and it seems a bit harsh.
At lower levels, you really have no chance whatsoever. Now, it might not bother you, personally, that the DCs are so high. But I'm trying to think of any DCs in the game
really that high. I mean, off the top of my head, DC 24 or 26 maybe is the highest I think I can remember seeing.
Looking at the other end of the spectrum... a
very easy task is DC 5, which barring bonuses means you have a 20% chance of failing it. Again, the DM has the "no progress" and "progress with a setback" instead of "failure", but still...
Does anyone else feel the DCs in some ways are a bit too high? I'm considering a blanket lowering by 5 or something.