I was not. I served as an adult leader for years, about 10 IIRC. Funny thing is during that time my fitness decreased until near the end of it when I discovered cycling. One troop that I was involved in did the merit badge as a troop in preparation for a several day tour down the Oregon coast. (This was after I left and started anew Troop with another Scouter.)
There are significant challenges to be a MB Counselor. 2 Deep leadership, youth protection training (online), registration as a volunteer adult leader, and Scouts must use buddy system. It's worth the hoops though and the hoops are in place to ensure a safe experience for all involved.
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Sir Mark, Knight of Sufferlandria