Anyone who doesn't think that sheer physical strength is an incredible asset in BJJ is disingenuous or stupid. As someone who took this up at 59 (62 now) and with less than average technique due mainly to declining neuroplasticity (brain flexibility); I can last longer against many advanced blue belts and some purple belts because of above average strength for my size and age. I'm difficult to submit and have worked some submissions in others because of strength.
This is not me being self-congratulatory. As anyone in the BJJ game knows, when after a roll someone says "Wow I didn't know you were so strong!"...that's not a compliment! On the other hand, I'm hopeful that I'm a little harder to kill because of it.
Just for reference though, there's a female purple belt who's actually world-class for her rank that always seeks me out to roll with. She's slightly smaller than me and taps me out on average every 60 to 90 seconds through solid technique. But she looks for me because she wants to challenge herself with someone physically stronger than average. She's smart though. She strength trains too (deadlifts and squats).