I don’t presume everyone is this way but I do presume many people might have an attachment to their collection of furniture. If it’s all worn down IKEA handmedowns then it might make sense to not move with it. I certainly see that with college students but after that, many people like what they got and it’s a large cost to give it up and buy new. And many people don’t like to buy used furniture too - I am someone who is fine with it.
I mean long-term I hope to be able to replace pieces of furniture with non-Ikea stuff. I was really trying with my TV cabinet, tried to get a unit with plenty of storage, but it was all... flimsy-looking, small and inconvenient. Finally bit the bullet, sat at a PC at Ikea and designed a very nice cabinet around a 60 inch TV.
I mean I only got the TV two years later, but it's the thought that counts.
I was in Europe moving from one house to another and I asked if we would take some small thing we bought with us and was told by my friend, "It belongs to the house." That really helped change my thinking on this, that things belong to the spaces they were purchased for, not to us specifically.
So yes, you can avoid moving furniture, but you still have “stuff”.
If you live like a bachelor sure.