Why? Before Martinez came in, the crowds were no where near sell outs apart from the odd game. Things had stagnated under Moyes towards the end and the attendances reflected that: 36,039 (2011), 33,228 (2012), 36,356 (2013). Far lower than the Capacity of Goodison. And then 2014 and 2015 the crowds increased but we still weren't selling out every game and there wasn't a waiting list. The interest from the fans now is way beyond what it was 2 or 3 seasons ago so Elstone is correct in what he says there. We wouldn't have considered a Capacity over 55,000 maximum back then, and now it appears we are looking at 60,000 or very close to that number.
As for your other comment about him not understanding EFC, I disagree there too in regard to the Stadium. He absolutely understands the fans and is at the forefront of getting a Stadium that closely matches what the fans want (whilst still being realistic).