Rabbits absolutely ARE high maintenance when looked after properly.
Sadly a lot of people buy them on impulse without researching fully beforehand, and that leaves them open for some nasty and very expensive shocks.
Some people do cut corners, they spend as little as they possibly can, they seldom if ever provide proper vet care, they feed cheaply and wrongly, they don't provide adequate housing, environmental enrichment or companionship and of course the rabbits suffer. The rest of us learn - often the hard way - what they truly need and are prepared to provide for all their needs.
It's not cheap, it's not all that easy, but the rewards are immense, having happy, healthy companions that live a long life with a great diet, proper companionship, good vet care, plenty of enrichment - with or without their owner and adequate housing The greatest joy is watching them just be rabbits, snuggling with a neutered, bonded, compatible partner, binkying when they are happy and excited, doing the 'dead bunny flop'. which is heart-stopping, especially the fist time you see it!, getting up to 'mischief' - which can be destructive for us but is normal, natural behaviour for them. If we aren't filled with joy when they do these things, they really aren't the right pets for us