I don't buy it, the main difference between mainnet and testnet is that Testnet addresses have different byte prefix. So if you manage to do a code to generate a taproot address in testnet you only need to change the prefix to generate it on mainnet.

Testnet can indeed be a valuable tool for learning how to generate Taproot addresses with your own code. Testnet is valuable for us as developers to experiment and test our code without using real funds.

Please don't burn satoshis on mainnet.

Regards.