thats true that subs are slower than fields. The nice thing I like about subs is that I know their actually changing inner beliefs I have at the subconscious level and can be very specific in what it target.
Absolutely, the only way to know for 100% sure is to make your own, which is actually quite easy (I’ve done it), it does take time and attention to detail though.
I treat using subliminals like buying a drug, sure you could have God knows what in what you take, but if you do your due diligence you should be mostly alright.
I usually use my natural intuition, but that’s just because I can easily get a vibe from certain things. Maybe not right away, but after a few listens I can feel if it is hurting or helping/doing nothing
Worse case scenario though is you can always flush, meditate, take a break from audios, or even cleanse your aura
But you are for sure right bro, you need to be careful when toying around with your subconscious mind. But my motto is “Where there is great risk; There is great reward”