>>1390263>>1390259>>1390244People take steel and even modern aluminum road bikes on light trails all the time. I think the issue here was the Technicum itself. It was an aluminum-steel hybrid that used super thin and light tubing with 'lugs' that were epoxied to the steel fork. I don't recall if the downtube on those were aluminum or steel.
for example anon could have ridden something like this
>>1389262 (modern strength aluminum road bike) or this
>>1388215(classic Guido steel) on a trail without issue.