People are still managing to ace them though. Like
@PJTierney said earlier, if PG's feedback data shows that a majority of people are getting stuck they may adjust them but as far as I know there's no evidence of this so far.
I'm not saying "git gud" but there's merit in hitting up social media or at least this thread to find out how other people do it. I'm no elite hardcore gamer but found everything except the drift zones fairly straightforward, if not a walk (or drive) in the park.
The right car makes a lot of difference. Try checking the leaderboards for each stunt to see what your friends and the top players are having success with.