I also think that it is unlikely that someone will find the same seed or a seed that matches the same address.
Especially if you consider the following factors:

The normal user generates in his life maybe 10 addresses and not always the sum times the number of people who live in 100 years make it very unlikely.

A hacker generates wallets to crack an existing wallet with money in it, he would have to check all wallets every hour to see if there are coins in them.

Even if a hacker would do that, then his storage space is not enough and it is again limited.

Despite everything, what method would you recommend or what software to create a wallet?
I could also create a 23 digit seed by hand and use lastWord to convert it to a wallet, but that is again insecure. And I am so paranoid to trust the fewest companies. OpenSource Sacen would be a solution, but I don't know the programming languages to verify that.
Apart from the fact that the effort is higher than the value I could ever protect.