Bees lived for thousands of years without foundation. Why not let them continue what works for them?
Because human beings are clever. They are always seeking to gain More and More from Less and Less - this paradigm being termed 'efficiency', which is considered by them to be a good thing.
And so we have bigger cells, bigger bees, bigger queens, bigger colonies, more and more honey, more and more money. It's always about "More and More" - always.
Unfortunately, although clever, human beings are sadly lacking in wisdom. Nature has established the 'norms' - in terms of cell size, colony size, and so on - over millions of years. These work, and have proven sustainable over that extended time-scale.
But we modern humans think we can improve on this. 'Improvement' meaning "More and More" of course, rather than staying with what has been proven to work over countless millennia.
The skeppists of the Middle Ages used to cull both their weakest, AND their strongest colonies - intuitively recognising that average performances are the one's to nurture for the long-term, not those which out-perform the others, for I presume they suspected that this increase in performance would have a hidden price-tag attached.
Selecting for the average, and not for the 'best' (undefined) - I wonder if such a reversal in thinking could ever be embraced ?