This can be because when you are making use of a wallet that has different addresses, then nobody would know the actual amount that is in your wallet. So, I would suggest you to make use of a wallet that would change your address anytime you’re about to make a transaction.
Avoiding address reuse is necessary for your privacy, but it is not sufficient. Equally important is paying attention to change and choosing which inputs you use in a transaction. There is no point using coins from 5 different addresses for 5 different transactions, if you later make a consolidation transaction which includes all of the change outputs from those 5 transactions, since that can easily be detected and will therefore link the 5 original addresses together.
For this reason when need to send any assets from my wallet to my friend wallet, then i create a temporary wallet then sent my fund from my wallet to my friend wallet.
Using a single intermediary address between your main wallet and your friend's wallet does almost nothing to protect your privacy. If you want to move coins from one place to another while obscuring the history, then you should do so via a mixer. Further, using a "temporary wallet" is a terrible idea. What if your friend decides to send some coins back to your address, only for you to find you no longer have access to that address because it was part of your "temporary wallet" which you have since deleted?