No issues with that, but we aren't talking about prolonged high current charging. We are talking about 5 minutes to simply get the car computer running. A lot of motorbikes have AGM batteries and people jump start them without issue.
However when you jump a dead battery, it is taking maximum possible charge during that time, especially if you leave the engine of the boosting vehicle running. There is no back voltage from the battery, so current is maximized. The problem as I understand it is the charging rate, not the duration. You have a chemical absorption reaction that has to take place to avoid bubbles in the gel, or venting of the AGM.
Yes, people do lots of things with their vehicles, but that does not make it good for the vehicles, nor do the die (right away).
I replaced my motorcycle battery this year and had a choice of a conventional vented battery or an AGM at about $15 more. When I asked to see the specs the AGM had lower capacity. I passed on the AGM, and promised myself I would take better care of the standard battery, and in the mean time enjoy more battery capacity. I see the rants about how great the AGM motorcycle batteries are, but I'm failing to see those benefits. I would suggest more of a fad and heavy sales promotion than anything else. In industry VRLA batteries have a rated life of 10 years. However actual experience shows they only last 3-5 years. So not only is Toyota selling us a very expensive battery, they probably will not last as long as a standard lead acid!
Google VRLA battery life cycle or failure mode and you will see what the issue is - venting, drying out, and no way to replenish the electrolyte.