That may be a good point. I use Marine deep cycle batteries (primary use for a winch & secondary use as a 12vdc power source) and have never had any issues. Those are not dedicated deep cycle batteries, rather, they are more like a modified automotive type battery. Back when I expected to regularly use a winch so continuously that it would get smoking hot, I used straight automotive batteries and lived with the inconvenience of limited run times for low amperage uses.

How do RVs and pick-up campers with on-board secondary batteries for power handle alternator based recharging?