Heavy strength training is difficult for many reasons:

requires great focus
takes time for movement preparation
is a slow, progressive, long-term practice
time consuming (set up, rest periods, etc.)
is dangerous when done wrong or poorly
can turn you into a bro

Plus, most of the general population isn't getting paid to take the risks of heavy strength training.

Lifting Light

A recent study showed it's the struggle point, not the weight, that improves muscle hypertrophy.

"Our data show that in resistance-trained individuals, load, when exercises are performed to volitional failure, does not dictate hypertrophy or, for the most part, strength gains."

So instead of thinking in terms of weight, we should be thinking in terms of effort.

Summary

We don't have to risk our health lifting heavy weights to achieve a good workout.

Instead, we just need to push ourselves out of our comfort zone, closer to failure.

In the words of Ronnie Coleman, "light weight baby!"