Please quote where I said that.

If you don't want to learn, that's fine, but honestly, combining multiple UTXOs from multiple addresses is very basic stuff. Consolidating your inputs like this is useful precisely because dust exists, and the idea is to combine all the dust from multiple inputs in to one output when fees are low to save you money down the line.

Look at this transaction for example: https://blockchair.com/bitcoin/transaction/dfa34fbf0c47a5f213e0e9815843513d05c9087fa52bc9120a9e9c357693b0cf

23 inputs from 23 different addresses, 21 of them being the absolute smallest amount of dust that is able to be sent (546 satoshi), all combined in one transaction in to a larger output.

With any half decent wallet, it's as simple as sending the entire balance of the wallet to a fresh address, and the wallet will automatically do the rest. With good wallets like Electrum, you can also manually select which UTXOs from which addresses to include in your transaction.