I like your enthusiasm.I agree, some people fuss over squats too much but many agree with you that squats aren't everything. Olympic lifts will improve squats to about the same extent that doing squats with 70-80% for a few reps will improve squats. Many sets will be needed, but it's valuable practice considering the ultimate goal of the sport. I've seen your videos on youtube - good luck with training and post some videos of your progress.
I have never seen any elite weightlifter or coach claim squats are everything. From my view, the relationship between the squats and lifts is very simple to understand. Given equal technique, the lifter that squats more will win. Given equal squat strength, the lifter with superior technique will win. Squats are your base of strength. A bigger base means more tools to work with. Technique is the measure of how efficiently you utilize that strength in the lifts. Both are necessary, both give diminishing returns at a certain point, and both need to be maximized and carefully prioritized based on individual needs and goals.
To be clear, I am not claiming that the snatch and clean and jerk are not strength exercises. Of course, they develop strength. But, they are primarily a power exercise or from my view even an "expression of power." Power is strength X speed, in crude terms. Can you train for speed in weightlifting or is it largely genetic? Not sure, myself, but I am skeptical speed can be progressively improved in this sport. This leaves strength and technique to work on. ;)