To clarify, in order for investment properties to work the value of a property must increase quicker than inflation in order to profit. Otherwise, you're not investing, you're simply retaining current buying power. This is true of all investments. You want your buying power to increase, not stagnate. This means that the cost of housing must increase at a higher rate than general inflation, and thus the cost of mortgage and rent must take up a larger portion of a persons salary otherwise the investors (landlords, investment property owners) will not profit.
Along with that income has not kept pace with inflation and hasn't for more than 50 years. Both these issues have compounded to create the issue we see today. This is a closed system, and in order for one piece of the economy to be more profitable other pieces must decline. Otherwise, you are stagnating. Stagnation under capitalism is death.
I agree though that the prices of housing should be tied to inflation (or, better, to a percentage of average wage) but that would, necessarily, mean that the property does not accrue profit, it only sticks to inflation. This is not profitable, this is not an investment. This would, essentially, abolish landlords but in a much more economically violent way as their investment portfolio is now worthless (as an investment).
In other industries the cost of each product can decrease as efficiancy increases, and volume increased through incremental changes and diversification. This allows for profit to increase while the cost of goods matches inflation (or, like with computers, they get cheaper). Now, I'd argue this is unsustainable as eventually you'll hit a wall where it's not possible to decrease cost to manufacture, and you must now increase cost to purchase quicker than inflation, but there are ways to mitigate this and in it's whole that is another conversation.
Apologies for novel, thank you for your kind argument though. You seem like a chill person