I can't see anything on the site that you linked to that say that cement based pointing will definitely cause the brick faces to blow. I am also at a loss to understand why a wet brickface would greatly benefit from pointing that absorbs more moisture. Sorry I am not trying to be confrontational, but it seems counter intuitive.
Can you provide any specific links?
Thanks.
Ok the link may not have illustrated the point, originally I read about this in a spabs publication many years ago.
I've seen it time and time again ...sad but I see it on old walls when I'm looking at old masonry. Start looking at old walls and you can't mistake that cement rich mortar damages the masonry be it brick or stone.
Question three is what you need to see
https://www.spab.org.uk/advice/technical-qas/technical-qa-11-repointing/
This is the point cement rich mortar is impervious, so evaporation from a wall then takes place from the brick or stone and it erodes whereas the mortar is in perfect uneroded condition. You can actually see where the mortar was in contact with the masonry but it's eroded away leaving sharp edges on the mortar where it was in contact with the masonry when it was pointed up. Now its gone ....I've seen this on historic houses too, ignorance has caused very bad damage.
With a lime mortar the evaporation takes place from the mortar bed and it's sacrificed but protects the masonry, but yes you have to re point more often.
I have my own theory that in a lot of cases it's purely the evaporation and not always spalling due to frost damage, you can see it a lot more from walls maybe waist height and higher not usually at ground level. The wind dries the walls out a bit higher up hence the increased erosion lower down the wall the wind is not as effective in drying it out do less erosion. These are my thoughts at pondering what I've seen loads of times. I'll post some images .
The damp in old buildings leaflet explains the point in detail.
https://www.spab.org.uk/publications/the-bookshop/
Based on this info and what I've observed I think just evaporation not necessarily frost and salts cause a lot of damage,