Yes of course, there are probably poorly made brake housings out there, just as there's poorly made anything. But the design of brake housing calls for the coils to lay against each other like a new unkinked Slinky. In that condition they are highly non-compressible. Usually, when you see spongy housing it's because someone kinked the housing permanently separating the coils. In the old days of road bikes, before aero levers this usually happened when people turned the bike over to work on it.

Keep in mind that brake cables operate at vastly highly tension/compression loads than gear cables.