This is because you can't gradually increase the difficulty by small margins over time, while in weight training you can increase the weight by 1 - 5 lbs at a time. (getthisstrength.com)
The high stakes require startups to burn through their budget with a very small margin of error, making manufacturing at scale even harder. (entrepreneur.com)
These camel bones however are within the last 4,000 years and thus we can reliably accept the dates with a very small margin of error. (religion.blogs.cnn.com)