It's funny isn't it. Some people run warm and some cold. In the uk I dive a neoprene drysuit and undersuit thermals from 4°C to 18/19°C (that we get in the hottest parts of the summer), my wife has two different weights of undersuit and a thermal battery powered heater vest for anything below 12°C. In warmer water I still need a 5mm in the 20-25°C range and can get away with a 3mm for 24°C and above. Some of my friends get away with just rash vests and suits at +24°C but my wife is in 7mm in 20°C and 5mm up to at least 27/28°C😂.
Always be comfortable, as what business is it of anyone else😂.