Large companies aren't going to chase every opportunity.
For example, a personal computer operating system that runs all your existing programs at full speed but doesn’t crash all the time and the ability to run a virtual machine on an x86 PC both took as long as they did to get to market primarily due to the technical difficulty, not because it was hard to find people ready to pay for them. Those kinds of hard coding problems are less plentiful, or at least less obvious today.
The tech is not there yet. It may not be ready for many years.
An LLM is just a really fancy nail gun to replace hammers. Much faster nailing, but you need to hold it right to not shoot yourself in the foot.