Because it's based upon a gold standard, where inflation hardly ever goes over 3%, so you can make good money just charging a fee. The longer the loan span, the higher the fee. And if they can't pay up, you just keep the collateral.

That doesn't work for building something like a cathedral, unless you have some similarly-valuable asset, like a second cathedral or a full gold vault.

there has never been and never will be a deflationary currency until bitcoin stops emitting new tokens

just should point that out... the supply of gold increases and has increased at 1-3% for all of recorded history by estimation, based on the sales of new gold from miners

i'm a tail emissions guy, so, my pet theory is that when the current precision of bitcoin is untenable it will be upgraded and emissions will continue at the same rate, most likely, just that previously there was nothing smaller than 1 sat... there is already millisats in LN protocol and as Mises points out, a fixed currency base does not preclude price calculation, in fact it makes it easier