The manual is part of the game. Playing the game is what is fun.
Manual is just cookbook ... you can surely follow the recipe step-by-step ... and maaaaaaaaybe, you get exactly the same result. OR, you can (its said right there on first page) you can switch some ingredients and quite possibly get something else ... it might still be good tho.
No. You are not a paid game designer. The manual is best. Larian needs to follow it.