If you are exceptionally careful and always have help moving anything of size, you may do better.
You called it. Ikea furniture never seems to support disassembly / reassembly.
I've thrown out several sets of Ikea dressers and such which lasted ~5 years while the stuff my dad built is still in perfect working condition 22 years later.
As far as the Ikea rack idea is concerned, holding any sort of weight has always been the major failure with Ikea furniture. They sell bookshelves which cant hold books... Dressers with 1/4 "cardboard" bottoms which cant support the weight of clothing.
you get what you pay for.
I've got an ikea bed dismantled, moved, rebuilt 3 times no problem, and a bookcase with the same dismantle/rebuild process 4 times. My office desk is also on 4 moves over 10 years.
[0] https://www.ikea.com/us/en/p/observatoer-cross-brace-galvani...
it looked god-awful but it was sturdy for years and years of production-quantity printing. It was only disassembled when the print lab got rebuilt.
so, in other words, I support your idea of modifying the construction of the lack wholeheartedly. The joint lines are one of the only 'strong-ish' elements on the entire table, and I think they'd take glue nicely.