Fusion is a disaster. At one point, VMware laid off the entire Fusion group; then, they changed their mind. Fusion used to be competitive with Parallels, but they now are so far behind they may as well discontinue it. There is always Virtual Box if you want free. VMware makes their money elsewhere. Revenue from Fusion is minuscule compared to other VMware product lines, and VMware always hated macOS to begin with. They made no attempt to create VSphere Client for macOS in over a decade.
Parallels make most of their revenue and profit on the Parallels virtualization software. Fusion is most likely a money-losing product for VMware, so they only carry it forward to take revenue away from Parallels, but they are doing a poor job at it.