LAFC and the Premier League don't represent all of football. LAFC's prices are significantly higher than the rest of its MLS counterparts. In Europe, the Bundesliga represents a much more money-friendly way to experience a fan's favorite teams. So the hike in prices isn't an all-encompassing movement.
Furthermore, this price increase isn't actually impacting attendance. The Premier League still sells well over 90% of its tickets; it seems that fans are still willing to pay for their favorite sport.
And even if fans don't pay to attend in person, we live in a digital age. Watching football on TV, or online, is free, subscriptions notwithstanding. So there's still plenty of room for fan interaction, and money isn't an obstacle to that.