Agreed.
First time players want safety – security – and as few joining hassles as possible. The process needs to be smoooooth.
Following that it often helps if navigation on the site is easy and uncomplicated – so they can find their game of choice easily – check account details etc.
Sometimes an all “bells and whistles” casino with too many options can simply be too confusing to be enjoyable for the first time player.
Different properties appeal to different brackets.