bruh of course it takes longer if you do it that way.
I dont even have sandbox in bookmarks I go to main page and then need to click sandbox.
In 4pc you can press a and get to analysis. then click edit position, paste your FEN4 and load it. You can also click start from here to move the pieces with legal moves. It's also easier to take a screenshot...
Also, we are playing 4pc. If its equal, there is no reason to use 8pc. You are simply used to it
Steps to move on 4PC analysis board (not easy to find all buttons)
1) Open 4PC server
2) Click 'New game'
3) Click 'Analysis board'
4) Click 'Edit position'
5) Paste the FEN4
6) Click 'Load FEN4'
Steps to move on 8PC board (intuitive)
1) Open the page from bookmarks in your browser
2) Click 'Load FEN8
3) Paste FEN8
4) Click 'Render'
And two more reasons:
1) Most people in this club are from 8PC
2) Ad of 8PC to others