First, I detest sweeping generalisations (all X are like/do Y: all X always/never do Y)), as well. Usually the 'truth' of a situation is complex and multifaceted, with a lot of variability. Many people tend to generalise from their own anecdotal experiences. As others have commented, there seems to be a lot of diversity in interpretation of proper "Guarding' and 'protecting' behaviours. I know absolutely nothing about Bandogs, except what I've read on this and other forums, and watched on YouTube. I've formed impressions, but I would not even consider making generalisations about them. My own experience with Boris (EM) is that I am quite convinced he would protect me. When we go for walks, he is always 'on alert', assessing our surroundings. If he sees something/someone he thinks looks fishy, he will move in front of me and stand at full attention, puffing out his chest. He will not move until he decides or I assure him the something/someone is not a threat. This is what I want/expect from him. He began this behaviour at around nine to ten weeks.
Related to his protectiveness,I had a bit of a chuckle, though. Boris is exceedingly fond of my Grandson (3 mths). When we are baby sitting, he spends every minute lying/sitting beside him. He gets quite upset when the baby begins to cry, and has actually got adept at licking his face in a way that calms him down. Anywhoo.... my Grandson HATES having his diaper changed. When I begin freeing the tape and the baby starts screaming, Boris will put his mouth around my wrist and try to gently pull my hand away.