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You are not fully understanding what is required when screwing your feet into the ground.
Your glutes are contracted 20% not 100%.
Identifying the amount of contraction required to perform the movement/skill is an important aspect.
You may start by contracting 100% and back off accordingly for the movement/skill being performed.
As Kelly has noted in episodes a cobra isn’t cobra tight all the time because that is expensive and not needed all the time. At certain times yes, 100% is required at other times 100% is not required.
Do you know a coach who can help you better understand this concept?
Watching a video about this could help or finding a written explanation may help better understand the concept so you can apply it.