Depends...if you get something like a Andrew Jones Mofi 888 for 5k, you may get some drivers that are superior to off-shelf anything...and you won’t be able to make them for $50 or $100 if you have to do the r&d from scratch.
I am highly doubtful that the drivers in any MoFi speaker are “superior to off-shelf anything.” Have you ever built a speaker with Satori drivers, especially the Textreme? They are built to an entirely different quality level than what you’ll pull out of any $5K non-factory-direct speaker like a MoFi, Wharfedale or Monitor Audio etc.
I don’t doubt that the 888s compete well against other $5K commercial options, if not wholly surpassing many of them, but hard to believe they will compete with >$12K speakers the way a Helios or Rinjani kit will. DIY really does yield twice the performance for about half the money IME. In other words, $3K worth of parts/materials + your labor can get you speakers that compete all day with $12K/pair commercial stuff. One of those truths the industry hates, but people are in the bizz to make money and labor is expensive. For many, the labor investment is not worth the savings, thus, I don’t fault anyone for choosing a complete product with a warranty over the DIY route, but the latter is the best bang-for-buck by far.