IMO, the 30% tax is less problematic when compared to the 1% VAT that is imposed on all cryptocurrency taxations. And that too in TDS mode. It means that if I want to transfer crypto from one of my wallets to another, then a 1% tax (on the transaction amount) needs to be paid and the details need to be shown in the tax return. For day traders, this is unviable. If they pay 1% as tax, then there is no way that they will end up with a profit. And this also means that crypto can't be used as a medium of payment, as it will be more expensive when compared to credit card or online bank transfer.
get caught on evading tax and really been involved with some in depth investigation which it couldnt really be that avoided that they would be providing all the details but speaking off making withdrawal on other
addresses then its true that you can get hold off those funds but for sure you would really be monitored out and it would really be mandatory that you should pay up tax.
By the way if they do not keep deep eye on every movement of their citizens then they can only monitor those who are depositing, withdrawing with their bank account and those who are using centralized exchanges etc.