Some schedules are easier to work around than others. Others pose external factors that just don’t align.
For example, restaurant workers waive their right to a lunch break. When that happens, can you still work with your allotted eating window, or do you end up shuffling things too much?
If your job, or other existing commitments, leave you with too little time to eat, this may be one of the disadvantages of Intermittent fasting you just can’t work around.