No it's more complicated. Projects like energy infrastructure take long. Little less long than a an aerospace project, but still long due to them being overseen by the government.
Say, a new high voltage switching substation is commissioned today, it will use plans drafted at least 5 years ago. This also means it used PLC's and software from 5 years ago. Because getting changes certified will take a lot of eyes and "consultants", again.
This is the root cause why democratic governments are fundamentally incapable of setting up an IT infrastructure. Everything needs to first-time-right, if not, there must have been mistakes made by someone. These mistakes must be investigated, by a commision. They also see IT as a cost, and not as an investment. This means each decision needs to pass by a council or commission, who hire many consultants because they themselves lack knowledge required to fill the position. This obviously does not work.
Managers care for the company, they have hired you because they don't know. It's up to you, the engineer, to make the systems safe and secure. You should refuse to build an unsafe system. The manager either agrees, or lost an engineer.