agreed, but if a company is making millions for the security of software, the incentive is to keep it secure so customers stick with it. Remember the lastpass debacle, big leak and lost many customers...
https://www.theverge.com/2024/5/1/24146205/lastpass-independ...
Why not?
Might as well ask why companies like money.
And no, the car industry has almost no competition. It's an oligopoly with very few players and a notoriously hard industry to get in.