share prices and house price falls

Why does a homeowner or a shareholder conclude than when the price of such commodities they own decline from they’re highs that they have somehow made a loss ? regardless of a what price they bought a commodity at ?

on the 30th of december 1997 apples share price was $12.75 no-one who owns apples shares from such a time, has a right to imagine that the losses that occurred post their gains after initial purchase is somehow they’re loss, the shareholder class are parasitic on the energy of those who innovate and push humanity forward, they have a value to foster innovation with investment, but theyre part in the affair overall, should not be over-estimated.