T9, T14 and T16 are all kind of in the same boat.
The rules have to be set somehow, so they came up with this stuff about one hour single engine flying time etc. But it's about as likely as an engine failure between V1 and V2 to happen. There is no reason to think that you can't make an airfield that is two hours away on a single engine if you have lost one. Conversely, the circumstances in which you lost the first one might lead to you losing the second. But somebody somewhere has to set the rules - and this seems as good a compromise between neuroticism and safety as any other.
Read Richard Bach's essays on how safe a flight plan will make you, or a certificate of maintenance, in "The Gift of Wings".