Time units are just as cursed as American units.
Conversion between days, hours, minutes and seconds is a total mess. If you never have to do anything with those numbers, you don’t need to worry about it. The moment you need to do calculations or compare devices you run into completely unnecessary problems that would have been easy to avoid. Just think of pumps and fans with units given in l/min or m^3/h.
Just pick the standard time unit and stick with it. Use prefixes to deal with big or small numbers.