It is achievable, but I would say that it is not easy. Big money has different psychological impact in decision making than small amount. Also trading gains/losses are non-linear in nature, it may impact once we see loss. For example, it is difficult to make 40K every month, in reality you may earn one month 20K loss and next month 1L profit.. though it is also 40K per month, but after having 20K loss, would you be able to keep your metal composure to earn 1L in the next month? Also, from this example you can understand, how targets go up once we take loss. because of 20K loss, it would force us to earn 1L in next month to keep our target. we have to earn 1L with 9.8L capital.
I agree if one is dependent on trading as main source of income would be stressful indeed (and not a good idea)!