Speedrunning is a niche interest which inherent does not attract mass appeal
Games should not be designed for speed runs if it wants to attract mass appeal. Speedruns are ONE way to play a game that interests a niche group of players. It should not be THE way to play.
None of the most successful games that have a wide player base designs their core game loop around speed runs. Games that have an active speedrunning community are games that are already designed well enough to make someone want to replay the game.
Games should NOT rely on speed runs to make a game replayable. The core gameplay should be good/rewarding enough to make a someone want to replay it.
To make matters worse, designing your game’s leaderboard to revolve solely around speedrunning to force players to replay a level/rift/mission/dungeon/etc is LAZY game design and is glaringly obvious that the development team recognizes that players have no other reason to play anything more than once.
In short: you can NOT make your game revolve around a feature that is inherently niche by definition and then wonder why your game does NOT have mass appeal.