The ratcheting tensioner engines just have a history of chain reliability.
Even if the chain wears a good bit, it will not change timing to a detrimental level. Chains are typically not changed because of their effect on timing, but because of their threat of breakage.
I expect that the ratcheting tensioner maintains a tight chain thus preventing slack at any one time. If the slack is allowed at various times a whipping efffect imposes impact loading of the chain.
Have a great day,