Why medium size condos of 50-60sqm are rare?

Been in Thailand (BKK and CNX) for many years and am currently looking for a new apartment.

I have noticed that usually there are either condos on the 27-45sqm range or much bigger ones from 70-100+ that are more suitable to couples or more than one individual.

I always found the size 50-60sqm being the best for one person but noticed how in Thailand these sizes are quite rare to be found? Older condos with these sizes seem to be more common, but still quite rare.

As a person who loves alone and works for home, I found anything below 50 too small and “jaily”, but anything above 75 already too big for one person alone.

Does anyone have any insight?