40% of global ship traffic is simply moving fossil fuels around! Renewables make much of this traffic obsolete
The issue is, that renewable energy requires a lot of rare earth metals. This bring a whole bunch of other issues. Politically and ethically. "In a perfect world it would be… " there is no perfect world. Humans never change.

not just that but that’s millions of jobs worldwide lost.

had we started moving to renewables 40 years ago, like we should have, the impact wouldn’t be as bad now.

40 years ago? There was an article release in ~1910-1912 stating that burning coal was increasing carbon rates in the atmosphere. We’ve known about this for 100+ years. Theres always sentiment about jobs being lost / unstable energy grid… companies just trying to exhaust fossil fuels before switching
hate to break the news to you…but renewable energy wasn’t viable in 1910-1912.
And the first electric car was built in the 1880s, so I think it’s fair to say that had people acted, it wouldn’t be as out of reach as the common person thinks.