2. Use of One Address Per Transaction. Even with a quantum computer, a hacker will only target your funds if your public key is exposed, so by using one address per transaction, it'll limit the exposure of your public keys, thus making it impossible for your funds to be targeted.
I understand your point but it's not like it will limit the exposure of your public keys but prevents you from losing your Sats on a compromisesd address. You see, there's no way you can prevent your public key from not beign exposed (atleast not with the current standard) so far you are going to spend the Sats.. Once spend, the public key is exposed on-chain so receiving on the same address
again is still "address reusage" which makes any Sats on that address vulnerable to loss if a QC can successfully perform the attack.
In addition, your public key is also exposed when you receive (yes, you heard that right!). However, it's hashed and so far the threat cannot pose a risk /break SHA-256 yet , it's safe to be exposed.