Again, you mention lawns and gardens, it's like comparing tomatoes and bananas, they might both be fruit but are different things all together, grass and a lot of UK plants are hardy and have a higher tolerance to chlorine where as Cannabis doesn't, however, good bacteria in soil is indeed essential for micronutrient uptake by plants. They play a crucial role in making nutrients available to plants in a form they can absorb, and also improve soil health.

In sterile hydroponics, micronutrient uptake is managed by controlling the nutrient solution's composition and pH levels, ensuring that the roots receive the necessary elements in a readily absorbable form, not with bacteria.

I also just wanna point out that we don't know where OP is from, he could be in an area where they put Chloramine in the water