Well I personally have interest in both but I can see how all the changes made to their respective core material can make you go away.
FF is the bigger offender to me. They changed genres. 12/16 of the main games were one genre but they kept making the turn based battle more and more simple with less control over what was going on, more automation etc and then they were left wondering why people were bored with that. It was a self fulfilling prophecy. The half assed janky action combat of 15 and VIIR was just as boring as their gutted turn based games. I will at least give them props for at least trying to do the action combat properly this time.
BotW was just underwhelming to me as I disliked the small dungeons and I have a list of gripes with the core gameplay loop of that game that I don't really feel any excitement for the next iteration that hasn't shown me anything that fixes my problems with BotW. It looks like more of the same things I didn't enjoy.