Originally Posted by
Jazzop
Show me a US-based airline with 97lb FAs, and I'll be the first to switch loyalties!
The thread was mainly in reference to Asia based airlines that do have 97 pound FAs and 7kg carry on weight limits, but often no charge for the first checked bag. (And yes, cost of injuries to FAs is a likely motivation behind the motivation.)
US based airlines typically have FAs who are likely to refuse to assist with carry on baggage, while not having any explicit weight limits for such carry on baggage. Charging for all checked bags is common so that there is more incentive for passengers to carry on everything.