This is why I advise my mentees to handle Bitcoin/crypto transactions and every financial dealings, including banks with an utmost precision a murder case demands. Don't rush over it. In my early days here I used to check few characters in an address but now I scan through all. It doesn't take much time to ensure that safety. I rather be safe than hurry up and end up being sorry. No hurry in life applies to this situation.
It's safest to check all characters of a Bitcoin address that is not too long so that there is not too much time needed for checking all characters. It's a very recommended checking step for Bitcoin owner and user practice but there is one more thing, people must avoid to publicly reveal their Bitcoin addresses, and avoid to reuse Bitcoin addresses.
If they don't reuse Bitcoin addresses and don't copy addresses from their transaction history, they already eliminate risk of address poisoning attacks.
Bitcoin Address Poisoning Attacks.No need of rushing because one Bitcoin block needs about 10 minutes to be found so your transactions likely won't be confirmed immediately in most of times.