Strength is neuromuscular in nature.
With study and practice we develop, improve and maintain skill. Lifting an object is a skill. The more practice we have lifting the object, the easier it is to lift it. This implies that we can lift a heavier object for the same original effort. We would do well to consider the scale of practice we need to improve our skill at lifting an object.
There is no substitute for repetition. We could be content lifting heavier and seeing our muscles grow but that is only part of our strength. The other part comes from our central nervous system. This one must be trained much more frequently to have any significant effect on our ability to lift an object. It takes a short time to learn to lift an object but it takes days, months even years to learn how to do it so efficiently that it requires so little effort. We need only look at Olympic weightlifters to see what it takes. These athletes are strong. Very strong. Yet don't lift heavier/heaviest/heavy every day. The bulk of their workout is composed of repetition and more repetition of the same few lifts over and over with a relatively light weight. Only do they lift heavier/heaviest/heavy when they want to gauge their progress or when they want to gain muscle mass.
We could argue that the Olympic lifts are highly technical. I think so. I also think that the smaller stabilizing muscles must be proportionately strong or the bar doesn't stay up. Unlike weightlifting, powerlifting doesn't require so much finesse so heavier weights can be lifted. But this doesn't mean Oly lifters can't lift heavy. They can and they do once in a while, just not on a frequent basis.
Whether it be light weight or heavy weight, the technique is the same. Consequently, for the CNS to learn the technique, it only needs to be light but lifted over and over. Lifting for strength as opposed to lifting for size requires one only to lift the object. Not to strain the muscles.
The CNS can learn a method at any speed. It learns a different method much more quickly when executed slowly but the point is that it can learn the method regardless of speed of execution. In essence, speed of execution is irrelevant to learning the method of execution. Similarly, mass of the object implicated in the execution is just as irrelevant when it comes to learning the method to lift the object in question. What matters here is the method and the repetition.
So for strength, instead of thinking "volume vs load vs whatnots", think method and repetition and more repetition. After all, lifting a very heavy weight will tax the CNS and fatigue is a limiting factor in strength production. This means lifting a heavy weight for the purpose of learning to lift a heavy weight is self-limiting. The heavier the weight, the slower one learns.