Because of too many options, in some cases ridicules options, almost never used options, unnecessary complicate the product.
It affects negatively on reliability, probably boot time, who knows what else, takes focus of not so big VIOFO staff from the really essential issues.
Take a look on how many resolutions are supported for Mini2 for example, does anyone (power users) on this forum use Full HD instead of native 2K?
Why reduced bitrates are option, is anyone on this forum (power users) using lower than max bitrate?
(No one should manually reduce resolution or bitrate on go because of hot weather, right?)
BTW, default option for Viofo DVRs is not a max bitrate and waste majority of DVR users are average consumers, not power users like on this forum, and it is not so easy to navigate thru all this options for them, most end up with default settings i.e. not using DVR for max performance.
In my opinion max performance and reliability should be in focus, and ease of use for average consumer.