It's almost always true that holding real estate is better in the long view than selling it. I expect my house to continue to rise in value indefinitely. Doesn't mean it's never the right call to sell it.
Actually, the usual belief held by economists is the opposite: that it's almost never true that holding real estate is better in the long view than selling it and investing it, since the value of land as a fraction of industrialized economies has been constantly falling and conversely, labor/capital rising. (There's also the diversification and uncompensated risk issue.)