Thanks all for your replies.
So, I think the consensus is that if you have True Visions via fiber from the street, you don't need fiber to each point where a TV box will be. Just LAN or good wifi will do it.
In the current house (BKK), cable comes in from the street, is split and connects to each TV Box via coax. When we had an issue with one box, True told us we should upgrade to fiber as they will phase out the cable in areas where the fiber is available.
The new house is certainly being hard wired with CAT6 cable to multiple points, including those where the True Visions TV Boxes will be. So: fiber to the where True's modem/router will be, then LAN for the rest. This should be true for this True Visions TV package: https://www.truevisions.info/platinum-hd.
Thanks all!