Casdon
Why is it a disadvantage? Every child in Wales studies a second language to GCSE level, which children don’t have to in England. Being able to speak two languages, whatever they are demonstrates an ability to learn languages. Both my children did Welsh GCSE, and did 8 other GCSEs, so neither they nor I feel they were disadvantaged. It’s very easy for English people to criticise from the outside.
Wales is not populated by just people of Welsh heritage.
It's good to be proud of culture and traditions and to encourage the learning of old languages before they are in danger of being lost. I have friends my sge who have started learning Welsh, one is now fluent.
However, forcing it on people as a first language, which is what several public bodies in Wales do, is wrong.
I don't agree with limiting children's choices either.