I know what you mean, everyone has their way of doing things and when it works for them they are convinced it must be the right answer. But the best advice is start simple, and understand what you are working with.
The cannabis plant is a strong plant and it will take a lot of abuse, but like any plant as a seedling it is weak and needs to adjust to its enviroment.
In general your potting soil is very "chunky", as in its not very fine. The pictures are a bit blury but it looks like you have some perlite in there ?, that is what i thought was stones , but regardless of what it is they are massive barriers for a little seedlings because they have to find a way around them which uses more energy. A bit like the wood chippings.. in the first stages of the seedlings life it is trying to establish a good root ball, when it hits the chippings it will not be able to grow through them but would have to find another way around, while doing this the wood chippings will decay and make your soil have hot spots.
In the future get yourself a potting soil that is quite fine, and mix in about 30% fine perlite for airation, fabric pots are also a winner.
As for now ?, i do not want to give you false hope. What you suggest might work but i think there will always be some decaying material that you will be fighting as a nitrogen toxicity as it gets older.
You have nothing to lose and everything to gain at this point. You might even have to do a mini flush and give her a little stake / tooth pick incase she droops afterwards, really hard to save a seedling with problems because the usual solution can also be a problem.