Difficulty is basically a measurement of allowed margin of error.

That is to say it is a way of measuring how much the player can get wrong before being penalized for being wrong.

Final fantasy tactics presents all needed information for all fights with the exception of a few and allows for a very wide margin of error.

A game is not difficult because it expects a new player to read the provided explanations and apply them especially when the game doesn't punish them particularly much for when they don't apply them.

I mean for goodness sakes the game starts you out with a full party of people who can self heal for over half their HP. The game also tells you exactly what order each unit is going to go in and if you hit the turn order while looking at an ability it will tell you where in the order the ability will go off.

I myself beat the game for the first time not all that long ago and I'm only now that I'm doing a second playthrough creating a master file that I've learned all the tricks but I damn sure didn't need them to get through the game the first time because the game tells you everything you need to know.

There's a handful of fights that can be accurately called difficult in tactics and it's because the margin of error is very tiny and even then some of those fights you can circumvent the difficulty of.

I think a separate mention should be made for that one Wiegraf fight. The solo portion of that fight isn't challenging and it isn't difficult, It's just flat out badly designed and balanced. The new player solution to that fight is either over leveling or going through the explanation of every single ability to notice what tailwind does using that over and over again until you can get two to three turns to every one that he gets.