Power Zones directly in Watts

Why can’t we modify the Power zones directly in Watts, (only as % of FTP) like we can modify HR.

% of FTP is BS anyway
Vingegard has higher FTP than Jacobsen, but for Jabobsen 200% of FTP (800W) is still a recovery spin and for Vingegard a Power he will never reach.

Our sprinters only train Z7 when over 1300W, nothing to do with their FTP.

We do all our riders in watts, but just have to do the maths to convert to a % FTP for each individual rider before pushing over the API.