It is much easier to construct a suit that will protect from sulfuric acid than one that will protect you from low pressure.

The problem with pressure suits is that positive pressure prevents the suit from being flexible, requires it to be made from durable materials, makes doing anything very hard and if there is any puncture you will loose the pressure immediately.

Sulfuric acid can be kept away with a tiny layer that covers your entire body. Also, you will not die (immediately) if you get a small puncture. Very minimal positive pressure is enough to keep vapours outside of your suit even in case of pretty large tear, giving you plenty of time to fix it.