What pc games did you play. the original march warrior had none. Crescent hawks inception had none. Star flight had none. civ had none. SIM city had a very basic one. They did have manuals though. A lol the info is out There. People just like there hands being held and I win buttons. Hence the simple difficulty setting of game.
Well, we don't have the old manuals anymore, because they are too expensive to produce compared to what benefits they offer. The games you rattled-off were produced during a very different period of time in games development, when people weren't making the best business decisions ever. Note that none of the development houses involved in those projects are still around.
Modern games, by and large, have in game tutorials. Throwing on rose tinted glasses and remarking about how 'Well, back in MY day...' is a great way to ensure that BattleTech retains the dubious distinction of being a property that is well recognized while having little to no mainstream appeal.