That would be right if they are requested without invitation, like so many have done for years.
But, sending out enmass, forms or ballots , leaves room for alot of fraud. Its just a simple fact...
Now, I'm not saying biden didn't win those states but for those looking for room to call biden illegitimate, they have it. Just like Russia and trump.
So first of all, this is not a new thing - almost a quarter of all votes in 2016 were cast by mail. Most of the states in play did not change anything for this election. Whatever rules they had before for mail-in were kept intact. This includes AZ, FL, GA, OH, and TX. WI, MI, and NV did send ballots to all registered voters, while PA didn't, but enacted other measures to encourage and/or effectively process mail-in voting.
Second of all, every state has processes for validating/verifying mail-in votes - the same way they have processes for validating/verifying any vote. If there is widespread (that part is key, since small scale fraud is likely to occur but unlikely to ever swing results) fraud, it will be hard to cover up.
The big difference is them sending them out unsolicited. I received 7 ballots for 4 eligible voters in my house. I got for 2 people not alive and 1 who has been living in a different state for 10 years.
You're in NJ, it's not very relevant. And if you're trying to show that the process is flawed, receiving ballots you shouldn't have, and those ballots being counted are not the same thing.