"Regulatory sabotage" is the latest talking point put out by the nuclear lobby. It's a fabrication. Regulations were built based on incidents and accidents in the past. Building nukes on the cheap would be like building deep-sea submersibles without certifications. It'll work fine, until it doesn't.
Certification and licensing only make-up a tiny percentage of a plant's upfront costs. Typically it'll be dumped in with engineering/design costs and those would be down around 15% of capital costs, depending a lot on the project.
The French government has traditionally been very pro-nuclear, and the industry has broad support from the population aside from the Green movement. They have had extensive incentive programs for the industry, both domestic and for export. And yet, they have had no better luck in building plants on time and budgets. Flamanville-3 is the poster child for overbudget nuclear projects. Construction started in 2007, was supposed to be on-line in 2012, but is currently projected to be completed in 2024. The budget went from €3.3B to an estimated €20B as of a 2019 French court audit.
The "oil industry" doesn't care about nuclear at all. Oil fired generators haven't been a thing since the oil shocks of the 1970s. The few that are still around are typically used as backup or peakers, as they're ridiculously expensive to run.
The coal industry would be so inclined, but in the US, coal plants have dropped from ~65% of generation to less than 20% of generation over the last 30 years. New plants are almost as expensive to build as nuclear, and as the plants get to end of life, they're being decommissioned rather than refurbished. The writing is on the wall.
Of the fossil fuel industries, only natural gas is competitive, and the plants are far, far cheaper to build than about anything else. They are the preferred type of new generation for utilities that have access to gas. Only regulation or government mandates really slow down new gas plants.