almost 3 years ago - Gay Myers (Luzi) - Direct link
It was implemented for several reasons, including saving people hands and keyboards. Carpal Tunnel and tendinitis are two painful conditions that can affect your hand/wrists and it is caused by repetitive actions most of the time... One of them being in the game called as struggling.

It is also stated in the PTB patch notes: "The most significant Live Design change in this update is the change to Survivor's Hook Struggle inputs. One of the motivating factors behind this update is to reduce the number of inputs per second in order to make the game more accessible to RSI sufferers. After the release of this mechanic for The Executioner's Cages and its positive reception by the community, we felt confident of making this change more broadly for all Sacrifice struggles."

https://forum.deadbydaylight.com/en/kb/articles/279-4-7-0-ptb

This is the main motivation. To help people with their issues.