Not sure, maybe a passed down statement from each teacher to their student?
I do agree there needs to be a balance. Tech overcomes strength when the opponent lacks skillwork and the strength is somewhat similar, and vice versa.
Like I mentioned in another thread, I believe its at the early stages that technique overcomes strength, which is what reinforces practitioner's opinion on the "strength doesn't matter" bs
eg. new guy shows up to BJJ practice 4-5 days a week. After a month, the tech is able to overcome someone with a slight to moderate strength/size advantage.
Strength however, does takes time to develop. Its not like you start on a 5x5 program and noticeable results will come. At least 4 months in will significant and practical results come, and even then its not enough to curl your way out of an armbar.
However, at the mid to late stage, strength will catch up and overcome, and the technique has to be worlds apart to extend the gap. I would say about 1-2 years is when strength becomes usable. Both parties train well, but one guy's technique and skill work is about 60-70% of another teammate, but his strength is world's apart, he'll be dominating.
Also, strength is a neutralizer. When both are grappling trying to overpower another, the weaker one will gas out. Both are matching each other, and the weaker one will exert everything or near everything to match the stronger guy, while the stronger one will exert a decent amount (or minimal if the strength gap is too much) to match/overcome.
All in all, I think in the short term, technique will dominate strength, but after awhile, strength will build up, and pass tech. unless the skill gap is worlds apart.
I would look at it as 2 guys at work (both making $40k yearly). 1 guy just works overtime regularly, so he'll be pulling in $50k at the end of the year, which is more than the other guy, just putting his 40 hours in. But after raking in decent exp 5+ years. The 2nd guy is qualified for a higher paying job, and switches to another company for $80-100k