That's not true - season tickets are definitely cheaper than pay as you go if you travel every day.
e.g. Annual Travelcards give you 12 months travel for the price of ten and a half.
https://tfl.gov.uk/fares/how-to-pay-and-where-to-buy-tickets...
e.g. Annual Travelcards give you 12 months travel for the price of ten and a half.
https://tfl.gov.uk/fares/how-to-pay-and-where-to-buy-tickets...
In reality I have a railcard so its actually £4.50pd / even less likely to hit caps.