Unless you have a fetish you sick bastard
The magic in watching speedruns is to be amazed at how players can demonstrate their skills using the game's features and, in most categories, how glitches are used to skip segments requiring skills unknown for normal people.
That is usually the game for Sonic games as they always have their good share of glitches, but it seems that the newest entry in the franchise will be the exception.
SPOILER WARNING IF YOU HAVEN'T PLAY THE GAME YET
When it comes to speedruns players usually make different categories as rules, some will prefer to show their skills playing each single portion of the game while others will show their knowledge of glitches to skip as much they can for the faster time.
In this case, the speedrun is around playing the game with all the functionalities already unlocked and falls under a category named "New Game Plus" and since Debug Mode is one of the functionalities of the game, well... you can what would happen below: