I think the OPs point is that it’s bounded below at a point not-distant from the mean, and hence you have a one-tailed and not two-tailed distribution. That non-trivially changes the distribution.

And then commented why: you have a finite amount you can do a task faster; but an infinite amount you can do it slower.

That is in contrast to heights or shoe sizes, which are (effectively) bounded on both sides while having the bounds distant from the mean.