Oh, I completely agree with you.
And I'm totally not a hardcore player or anything, but my LTWs are usually completed towards mid-YA. Admittedly, I play using epic lifespans and I usually go for an easy one (Like getting to the top of a career path). I just made one with the LTW of 6 tombs in each place, which might be a bit of a challenge, but still. I feel like almost all sims (except for the ones played by serious amateurs who were akin to the Sims 1ers who took the ladders out of pools) accomplish their LTWs, which is not very realistic, is it?