they are. (unless we’re talking about Mac only, which are not as repairable or upgradable)
desktop allow for a far better modularity, and reparability, far more ports, PCIe expansions like sound cards, etc.
If my screen breaks or I’d rather use a bigger one, I just buy a monitor and plug it in. If my CPU dies or is no more enough for my use case, I’ll just buy a better one while still using every other component. If I need more hard drives, I’ll just buy more SATA cables. If I need better sound, I’ll buy a sound card.
those features are dealbreakers. laptops will never be able to compete with a real desktop.