> You cannot tenuki in Chess.
You absolutely can! If it's during a tactical sequence we might call it an intermezzo. If it's not during a tactical sequence we don't usually have a name for it in chess but it happens all the time. The mainlines of the KID are famous for having theory where white goes for a queenside attack and largely ignores the kingside and vice-versa for black, just as one example.
> Chess is almost all tactics. Go on the other hand, is Strategic I used to think so too but I think this is a meaningless and superficial comparison now. Each go move is simpler by itself but to counter balance that you get a much bigger board and generally much longer games with much longer tactical sequences (I'm sure you've had games where you spend over 50 moves in a long tactical battle over a mojo, for example).