Rather then measure expertise with practice (subjective), I feel like it’s much more productive to measure it with time spent (objective, hence 10k hours) on it

Rather then measure expertise with practice (subjective), I feel like it’s much more productive to measure it with time spent (objective, hence 10k hours) on it. Time spent feels much less stressful than “I’ve practiced heavily regularly”. Since humans inevitably improve with repetitions or practice, it’s less scary (for me or imo) to just “put in time” versus “practice” to get possibly better or intimidated by what’s “enough expertise”