The reason why you can't tinker with soil is because there is no cause and effect, you can do something but it will take days for it to show, because of the buffering properties of soil, you never really understand if what you did was good or not, thats why it doesn't build your confidence up, thats why everyone sticks with soil and never branches out to learn new things, because they don't have the confidence to do it, and hydro is too hard and complicated,
hydro can be just as simple and straight forward and soil.
i spend a max of 20 mins with my plants every 3 days, apart from that i don't see them, i know exactly what is going to happen, i know how long a feed will last i know how much nutrients i need, and if you get nute burn you know its because you gave it x ppms last night or you didnt' bother checking ph, you can tell exactly what your problem is, because you made the changes that caused it,
thats why you don't see that many hydro growers posting threads like whats wrong with my plants, you seem to see endless threads like that from newbie soil growers though, because they never know really what they are doing, they just rely on someone giving them vague measurements like add quarter strength, or add a teaspoon of calmag to a gallon of water.
Last night i fed my hydro plants 1.6ec of bloom and 0.2 ec of pk boost, the water was also ph 5.72 and the temp of the water was 70 deg,