There are a hatful of reasons it works at Skegness and apart from the short turnaround trains it works pretty well. I usually open them up for boarding ASAP.
It also allows me to have my fights with the local idiots (to be fair most of them have come to know I don't mess around and go quietly) and not so local idiots on the station rather than the riskier environment on-board.
If the customer experience is something you value the Skeg line in holiday season is probably best avoided anyway. 2 or 3 hour waits for shortformed crush loaded trains that then pootle along at 50-60mph the long way round full of kids playing games on tablets without headphones, families dropping food, adults drinking, the odd fist fight and so on. It's not exactly the Orient Express. I once had a well spoken family get off at Skegness having decided to have a day at the seaside whose father declared they hadn't seen such degenerate behaviour since he left an Indian slum as a small boy 45 years previously.
I've been doing it a while now and every summer I survive unscratched is a bonus. Though some scummer once followed me up the platform screaming that they hoped I got hit by a bus because I wouldn't let them take their unfolded pushchair on a full train