Aside from what other member said, i also wondered why you specifically mentioned term P2PKH (sometimes called legacy address) but doesn't mention other kind of address (e.g. P2TR).
The following terms have descriptions that are inaccurate or not applicable to Bitcoin:
13. Wallet Backup -- It says to update the backup every time a new address is generated. That is unnecessary and risky for a bitcoin wallet.
To be exact, it's no longer applicable today since wallet these days create HD (hierarchical deterministic) wallet.