"Richard Thomas" wrote:

If this is the case (which I really hope it is) why are we taught that, in
the event of lost comms we are supposed to commence an approach at the ETA
or EFC time?

Is that really what we're taught?

I assume you're referring to 91.185(c)(3), but that only talks about leaving
a clearance limit. If you're cleared to the destination airport, as you
almost always are, there's no question as to when to leave the clearance
limit. You fly there and land and you're done.