I dont think leaving your laces looser has to do anything with pressing better, when i hit rails i have my boots like i always wear them. If you leave them loose it makes pressing harder because they are less responsive, just my opinion
Hype's ERA boots were the preferred park boot b/c they were stiffer than most. But winching and rail riding is changing every day, looser bindings make it easier to press and def release on bails. Not to mention just getting in and out every 30 seconds.